Solve x^4 - 12x - 5 = 0 given that -1 + 2i is a root. I’ve used synthetic division to get the answers x = 1 +/- 2i , 1 +/- sqrt 2 I’ve having trouble checking the answers

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  1. Math

    1. What is the simplified form of the expression? 2x2 + 4y + 3x2 – 2y + 3y (1 point) 5x4 + 5y2 5x2y + 5x2y 5x2 + 5y 10x2y 2. Simplify the following expression: 2(6x + 18) (1 point) –12x + 36 8x + 20 6x + 36 12x + 36 3. What is the product? 4 • (–5)

  2. Algebra 1

    1) what is the simplified form of (x-2)(2x+3)? Use the distributive property. A) 2x^2-x-6 B) 2x^2-6 C)2x^2-7x-6 D) 2x^2 +x-6**** 2) what is the simplified form of (3x+2)(4x-3) use a table. A)12x^2+18x+6 B) 12x^2+x-6 C) 12x^2+18x-6**** D)12x^2-x-6 3) what

  3. Algebra

    Use the quadratic formula to solve the equation. Give exact answers: 2x^2 -1 = 6x. The choices are: a) -3 + square root(7)/2, -3 - square root(7)/2 b) 3 + square root(11)/2, 3 - square root(11)/2 c) 3 + square root(7)/2, 3 - square root(7)/2 d) -3 + square

  4. Calculus!! HELP!!

    1) The sides of the triangle shown increase in such a way that (dz/dt=1) and (dx/dt=(3dy/dx)) At the instant when x = 12 and y = 5, what is the value of dx/dt? 2) Let f(x) = x^3 − 4. Which of these is the equation for the normal line to this curve at the

  5. Algebra II

    Solve x^4 - 12x - 5 = 0 given that -1 + 2i is a root. I’ve used synthetic division to get the answers x = 1 +/- 2i , 1 +/- sqrt 2 I’ve having trouble checking the answers though because of that imaginary number. How can I check these kind of problems?

  6. Algebra 1

    A square painting is surrounded by a frame. the outside edges of the frame are x inches in length, and the frame is 3 inches thick. What is the total area of the frame? A)-12x+36 B)12x-36 C)x^2+12x+36 D)x^2-12x-36 Is it C or D?

  7. Calculus

    The marginal cost of a product is modeled by dC/dx =12/Cube root (12x+5) where x is the number of units. When x = 13, C = 160. (a) Find the cost function. (Round your constant term to two decimal places.) C= Ans- 3/2(12x+5)^2/3 +115.61 ???? (b) Find the

  8. Algebra. Please check my answers

    Evaluate a/b+c^d for a=6,b=3,c=4 and d=5 A.42*** B.18 C.82 D.360 What is the simplified form of the expression ? -(12x-8y) A.12x+8y B.12x-8y***** C.-12x+8y D.-12x-8y

  9. Trigonometry

    I'm trying to find the cosecant of 11 pi/6. The answer is -2, but I'm not sure where this came from. I thought You would flip the sine value which was sq. root of 3/2, making it 2/sq. root of three, which would then become sq. root of -6 over 3 or sq. root

  10. Math simplifying mixed radicals

    Please help me simplify these following mixed radicals:: and show me how you did it cause I need to learn : I don't know how to type a square root sign so I just wrote square root and the numbers infront of the square root are supposed to be multiplied. 2

  11. algebra

    -(12x-8y) i am a little confused by this. would the negative make 12x into -12x, and then -8y becomes +8y instead? would it be -12x+8y

  12. Math

    For the equation 2x 3 - 11x 2 + 12x + 9 = 0, the root 3 has a multiplicity of _____.

  13. math

    Which linear equation represents a non-proportional relationship? A) y = 0.2x B) y = 12x C) y = −12x D) y = −12x + 5 i don't know how to do this or what it means, please help me

  14. Algebra 2

    Simplify Each Expression. Rationalize all denominators. Assume that all variables are positive. 3 times the square root of 11x^3y (the three is an exponet) over -2 times the square root of 12x^4y (the 4 is an exponet)

  15. math

    solve the equation below algebraically and express the result in simplest radical form 13/x=10-x I did 13/x=10-x multiplied each side by x and then subtracted 13 to get 0=13-(10x-x^2) x^2-10x+13=0 x=(10+/- square root of 100-52)/2 x=(10=/- 4square root 3)

  16. Algebra

    To solve 9x^2-12x+4=49 by using the Square Root Property, you would first rewrite the equation was as A. 9x^2-12x-45=0 B.(3x-2)^2=+/-49 C.(3x-2)^2=7 D.(3x^2)^2=49

  17. Calculus

    Q.a.Find the stationary points on the graph of y=12x+3x^2-2x^3 and sketch the curve. b.How does your sketch show that the equation 12x+3x^2-2x^3 =0 has exactly three real roots. c.Use your graph to show that the eequation 12x+3x^2-2x^3 = -5 also has

  18. Algebra

    I have some problems that I am having trouble with and I have some that need checking please. Thanks! Solve the equation. 4. (x+7/4)=2(x-1/6) Find all the value(s) of x that make thedenominator(s) zero. Then solve the equation. 6. (x-8/2x) +5= (x+6/x)

  19. Algebra

    I think that the goal is to get rid of the 5th root in this case. I know that I have to make whatever is under or in the root -in this case the number is X equal some number to the fifth power. I am supposed to use the rule a^(m/n)= n (the n-root) (don't

  20. Algebra

    Rationalize each expression by building perfect nth root factors for each denominator. Assume all variables represent positive quantities. I don’t understand how to compute these. Also I don’t have the square root sign so I typed it out where it would

  21. Pre-Calculus

    Solve 0 = 3x^2 + 5x -1 by completing the square. Express your answer as exact roots. 3(x^2 + 5/3 + 25/36) = -1 (x+ 5/6)^2 = 37/36 sq root( x + 5/6)^2 = sq root (37/36) x + 5/6 = +- sq root 37/6 x = -5/6 +- square root 37 /6

  22. Algebra

    what is the square root of 12x^3y^2

  23. Physics

    The kinetic energy of a proton is half its internal energy. What is the proton's speed? Kinetic energy is (Yu - 1) (mp) (c)^2 = 1/2 (mp) (c)^2 Yu = 1.5 Yu = 1/(square root) 1 - (u/c)^2 1/(square root) 1 - (u/c)^2 = 1.5 u= 0.745c How do I solve for u? I'm

  24. Math simplifying mixed radicals

    Please help me simplify these following mixed radicals:: and show me how you did it cause I need to learn : I don't know how to type a square root sign so I just wrote square root: 2 square root 48 3 square root 81 6 square root 12 3 square root 32 2

  25. Radicals3

    State the restrictions on the variables and then simplify each of the following expressions. A.) X root 12x^4 The answe is 2x^3 root 3 but I don't know how to get the answer it. B.) (3x root x^2)(2 root x^5) The answer is 6x^4 root X but I don't know how

  26. math

    How do you solve this equation using the elimination method 12x – 20y = 64 12x + 9y = 6

  27. Geometry

    mx^2+12x+9m=0. for what values of m will the equation have one repeated root? I can't remember how to calculate double root values

  28. math

    Solve for x: [Sixth root of 27]+[cube root of x] = 6/(3-[square root of 3]

  29. College Algebra

    I need some help with a handful of questions. I need to see the steps on how to get to the final answers. I would also appreciate if you can explain how you got to those steps. Rationalize each expression by building perfect nth root factors for each

  30. Math

    Just need some help... Directions: Multiply or raise to the power as indicated... Then simplify the result. Assume all variables represent positive numbers. 1. 5(square root of 6) times two-thirds(square root of 15)= 3 one-third (square root of 90)= (This

  31. Math

    Which expression is the expanded form of p(x)=4(x−7)(2x2+3)? 8x3−56x2+12x−84 8x3+56x2−12x−84 32x3−224x2+48x−336 −48x2+12x−84 I believe it is 8x3−56x2+12x−84 if I am wrong can you explain

  32. math

    I HAVE THESE ANSWERS FOR THE PROBLEMS. COULD YOU DOUBLE CHECK PLEASE, THIS IS A PRACTICE QUIZ WHICH ISN'T A GRADE IT JUST HELPS ME GET READY FOR THE TEST. 1) a 2) b 3) d 4) a 5) d 1. Solve x^3 + 6x^2 + 13x + 10 = 0. a) –2 + 2i, –2 –2i, –2 b) 2 + i,

  33. algebra

    1.)correct 2.)wrong---> the first term is wrong 4(3a^2)^2 = 36a^4 3.) not sure on this one 4.) wrong---> - square root of six is not a solution Hope this Helps! 1)find p(-3)if p(x)=4x^3-5x^2+7x-10 =-184 2)If r(x)=4x^2-3x+7,find r(3a^2) =12a^4-9a^2+7

  34. Math

    f(x) = 3x^2 , g(x) = 3x-1, and m(x) = 4x Find and simplify the composition function g(m(f(x))) answers i got which were wrong 3x-1(12x^3) 36x^4-12x^3 Maybe i am putting the information in incorrectly.. Should it look like this (3x^2(4x(3x^2))) then solve?

  35. algebra

    1)Write the expression 9n^6+7n^3-6 in quadratic form,if possible A.9(n^3)^3+7n^3-6 B.9(n^2)^3+7(n^2)-6 C.9(n^3)^2+7(n^3)-6 D.not possible I'm thinking C on this one but im not sure 2)solve b^4+2b^2-24=0 A.-2,-square root of 6,square root of 6,2 B.-square

  36. algebra 2

    Add(1/12X^4+6/7X^3+3/8X^2+5)+ (-7/12X^4+5/8X^2-5). "Please help me solve this"

  37. Algebra 2

    Add(1/12X^4+6/7X^3+3/8X^2+5)+ (-7/12X^4+5/8X^2-5). "Please help me solve this"

  38. Derivatives

    What is the fourth derivative of f(x)= e^-x^2. I got f''(x)=-2e^-x^2 + 4x^2e^-x^2 i need some help on find f''''(x) You have f(x) = e-x2 then f'(x) = -2x*e-x2 = -2x*f(x) f"(x) = (4x2 - 2))e-x2 = f(x)*(4x2 - 2)) f"'(x)= f'(x)*(4x2 - 2)) + f(x)(8x) =

  39. College Algebra

    I need some help with a handful of questions. I need to see the steps on how to get to the final answers. I would also appreciate if you can explain how you got to those steps. Rationalize each expression by building perfect nth root factors for each

  40. College Algebra help please

    I need some help with a handful of questions. I need to see the steps on how to get to the final answers. I would also appreciate if you can explain how you got to those steps. Rationalize each expression by building perfect nth root factors for each

  41. Algebra Word problem

    I don't know how to put in a square root symbol here so know that it is over h. The equation D=1.2 square root h gives the distance D in miles that a person can see to the horizon from a height h in feet. Solve for h. Do I find the square root of 1.2?

  42. Algebra

    How do you work square root problems when there is a number outside the radical that needs to be divided out. Example: 2(square root of 5x-1)=3(square root of 2x+4). How can you get both of the radicals by themselves in order to solve the equation?

  43. geometry

    Find the coordinates of the center and the radius of a circle with and equation of: a. x^2 + 2root7x +7 + (Y-root 11)^2 =11 b. x^2 -12x + 84 =-y^2 + 16y

  44. calc

    What is dy/dx of y=12/12X-y^3 ???? Any idea anyone??? y=12/12X-y^3 I assume you mean... y=12/(12X-y^3) 12Xy-y^4=12 12x dy/dx + 12y -4y^3 dy/dx=0 dy/dx (12x -4y^3)=-12y solve for dy/dx

  45. Algebra

    Solve 2+ the square root of 4-x=x what is your question? ok lets start by arranging everything so its easier to solve.. u want to put the square root(4-x)on one side of the equation and the 2 on the other side... square root(4-x) = x - 2; now..to get rid

  46. help...solving a polynomial....algebra

    solve this please....help me....12x(squared)+7x-10 Do you wish to factor this trinomial? If so, the factors are: (4x + 5)(3x - 2) You can use the FOIL method to check. If this is supposed to be an equation: 12x^2 + 7x - 10 = 0 ...then set each factor equal

  47. Algebra problem

    Multiply (x-5/4x+8)*(12x^2+32x+16) A. (3x+2)/4(x-5) B. (x-5)(3x+2)/4 C. (x-5)(3x+3) D. (x-5)(12x+8) Please help me solve this problem because all I get is 3x^2-13x-10 (which isn't a choice.)

  48. Algebra

    Set up the Discriminant 2x^2+12x+10 A) (square root of) 122-4(2)(10) B) (square root of) 22-4(12)(10) C) (square root of) 12-4(2)(10) D) 122-4(2)(10) Can someone help, I am really confused.

  49. math

    determine the area of triangle abc when side ab= square root of x, side bc= square root of x, and side ca= the square root of the square root of x. So how do I solve it. How do I add the square root of x + the square root of x + the square root of the

  50. Algebra

    2(3x - 7) + 4 (3 x + 2) = 6 (5 x + 9 ) + 3 how will solve it? well you first multiply it out: 6x-14+12x+8=30x+54+3 you combine like terms 18x-6=30x+57 -12x=63 x=-63/12

  51. precalc

    For the equation 2x 3 - 11x 2 + 12x + 9 = 0, the root 3 has a multiplicity of _____.

  52. algebra

    5x -3 = 11 + 12x combine like figures add 3 to both sides to remove the 3 5x= 14+ 12x Now I get confused. If I remove the 12x I have to subtract 12x from 5x which gives me an answer of -7x=14 would the correct answer thus be x= -2? thanks

  53. Algebra

    Please read and then help me! (x^(-3/5)) ----------- divide x ^ (1/5) I know the problem then needs to look like this: (x^(-3/5))(x^(-1/5)) (multiply the two above) Then it needs to look like this: (I can't write it though, so I'll tell you) The 5th root

  54. Algebra

    What is the vertex form of the equation? y = -x^2+12x-4 My work: -(x^2 + 12x)-4 -(x^2 + 12x + 36)-4 + 36 Y= -(x+36)^2 + 32 Is this correct? I am not sure if I did this right or not? Thank you!

  55. math: polynomials

    Please help me with these three problems! 1. solve for x: 3x + 5x^(1/2) - 28 = 0 2. solve for x: square root(2x-5) - square root(x-2) = 2 3. Find all values so that polynomial: ax^2 + 5x + 2 has two distinct real roots.

  56. math

    2.)If f(x)=3x,g(x)=x-3,and h(x)= the square root of x, find (fogox)(X). I really didn't get this will someone please show me how to do it? This I what I did to solve for it: 3(x-3) 3(he square root of 25-3 3(5-3) 15-9=6 Ok here is another way I solved for

  57. math

    What does it mean to have the sqaure root of 5 with a 2 in front of it? How do you figure it out? 2 sqrt 5 is two times the square root of 5. It depends where the 2 is placed wrt the square root symbol. If it is on the same line as the square root symbol,

  58. Algebra

    I'm not sure how to factor 3x^3-12x^2+3x. I tried separatring the 3x so that 3x(x+1)(x-4, but I got -3x^3+-12x^2-3x^2+12x. Can you show me where I went wrong and how to properly factor this? Is there a general rule or tip for this sort of factoring with a

  59. Math

    Solve. (-10x^3+30x-20) / (-5x+5) A) 2x^2-2x+4 B) -2x^2-2x-4 C) -2x^2+2x+4 D) 2x^2+2x-4*** Simplfy x/6x-x^2 A) 1/6-x; where x=0,6 ***** B) 1/6-x ; where x= 6 C) 1/6x ; where x = 0 D) 1/6 Simplfy x-2/x^2+4x-12 A) 1/x+6; where x=-6 B) 1/x+6; where x= -6,2***

  60. Advanced Algebra

    Can you please explain to me how I can solve these problems? (3^ square root of3) ^square root of 3 (x^ square root of 2) ^square root of 7 5^(2)(square root of 3) • 5^(4)(square root of 3) x^(3)(pi) / x^(pi)

  61. Math

    What are the solution sets of the following 3 problems,the square root of x squared + 3x = x-3, the square root of 3x + 10 = x + 4 and finally the square root of 8x - 2 = the square root of 2x? Help much appriciated. I will one as an example. sqrt(3x + 10)

  62. Math

    Precalc stuff.. square root of z-1= square root of z +6 are you solving for z? square both sides then solve for z. that's my problem, i'm not sure how to solve for z. i need a process. it's not in my book or anything.

  63. math

    Could you please solve so I can double check my answers for the practice quiz? Thank You!! 1. Solve x^3 + 6x^2 + 13x + 10 = 0. a) –2 + 2i, –2 –2i, –2 b) 2 + i, 2 – i, –2 c) –2 + i, –2 – i, –2 d) 2 + 2i, 2 – 2i, –2 2. Find the

  64. algebra2

    1/3 - 5/6 = 1/X SOLVE 1/3 - 5/6 = 1/X Let's remove the denominators by multiplying by 12X 12X*(1/3) - 12X*(5/6) = 12X*(1/X) Clear the fractions. 4X - 10X = 12 -6X=12 multipy by -1 6X=-12 Divide both sides by 6 6X/6 = -12/6 X = -2 Check my work.

  65. Algebra 2

    Replace each of the question marks with a value that will make the polynomial a perfect square trinomial. 1. 4x^2+12x+? 2. ?+90x+81 Could someone show me how to solve these? Take the first: factor out the 4 4x^2+12x+? 4( x^2 + 3x + ?) take half the center

  66. math

    Solve the system:4x+2y-13=0 and 3x=5y+26 by elimination. 3 (4x+2y-13=0) 12x+6y-26=0 4 (3x=5y+26) 12x=20y+104 I need to subtract since the signs are the same: 12x+6y-26=0 Since they don't match up, I'm having trouble subtracting them. I'm not sure what to

  67. math

    My problem I have involves a method that requires using the quadratic equations that comes from India. Here the problem that I have to solve : x to the second power plus 12x minus 64 equals 0 I need someone to walk me through each step to arrived to the

  68. Algebra

    I had to solve the function g of f where f is x^2+1 and g is sq. root of x. I wrote this out as the sq. root of x^2+1. The ^2 and the sq. root canceled each other out, so I was left with x + sq. root of 1. But my book got sq. root of x^2+1. Was the further

  69. Pre Algebra

    Please help me with some problems. Thank you! Solve the equation by square root property. 3. 2x^2 = 26 I don't understand how to solve this problem. Solve the equation using the quadratic formula. 7. 7x^2=-8x -2 This is what I got x= -8 -or+ square root

  70. Algebra

    I had to solve 2x^2-x-1 using the quad. formula. I got it down to (1 +/- the square root of neg. 8) divided by four. I broke the sq. of neg. 8 into the sq. root of 4 and the sq. root of -2. But my question is could it also be the sq. root of -4 and the sq.

  71. Roots and Pre-cal

    Find the roots of the function f(x)= x^2 +2x+2 a)-1 + sq root of 2 and -1 - sq root of 2 b) -1 + i and -1 - i c)-1 -2i sq root of 2 and -1-2i sq root of 2 d)-1 +2i and -1-2i The i's are in italics but I can't .make them in italic here for some reason

  72. Pre-Calculus

    Solve. Express your answer as exact roots. (s+6)^2 = 3/4 Sq root (s+6)^2 = +-sq root 3/4 (s+6) = sq root 3/ 2 s = -6 +- sq root 3 ----------------- 2 (The answer according to the textbook is (-12 +- sq root 3)/2. What error have I made?) Thank you

  73. Math

    1) Solve equation 3r+5 _____ + 2 = 2r to find the value of r? 2 A. 2 1/7 B. 3 2/3 C. 15 D. 10 2) which is these is a rational number. A. Sq root of 14 B. -sq root of 9 C. -sq root of 34 D. Sq root of 72

  74. Algebra

    There are 5 quadratics below. Four of them have two distinct roots each. The other has only one distinct root; find the value of that root. 4x^2+16x-9 2x^2+80x+400 x^2-6x-9 4x^2-12x+9 -x^2+14x+49

  75. algebra

    There are 5 quadratics below. Four of them have two distinct roots each. The other has only one distinct root; find the value of that root. 4x^2 +16x - 9 2x^2 + 80x + 400 x^2 - 6x - 9 4x^2 - 12x + 9 -x^2 + 14x + 49

  76. Polynomial Fucntion Problem

    Could you help me with the following problem, I don't understand how to do it. Am I suppose to use the linear factorization theorem? Find an nth degree polynomial function with real coefficients satisfying the given conditions. 1. n=3; 3 and i are zeros;

  77. Algebra

    Solve for y in terms of x . Determine if y is a function of x . If it is, rewrite using notation and determine the domain. xsquared+12x-3y+9=0 is it xsquared + 12x +9=3y f(x)=xsquared + 12x + 6=y ?

  78. college algebra

    Solve: sq root of (x+1) minus 3 = sq root of (x+4) when I solve it I get zero, but when I plug it back in only one answer works. do both have to work for it to have a solution?

  79. algebra 2

    Add(1/12X^4+6/7X^3+3/8X^2+5)+ (-7/12X^4+5/8X^2-5). "Please help me solve this"

  80. algebra1

    could you walk-through the steps to solving this problem because I am stuck; 3x-5(3x-7)=2(x+9)+45 Let me know if you have a question in any step. 3x-5(3x-7)=2(x+9)+45 3x-15x+35= 2x+18+45 -12x+35 = 2x+63 -35 -35 -12x= 2x +63-35 -12x= 2x +28 -2x -2x -12x-2x

  81. cubic function

    I am absolutly stumped at how to solve this. I know for squared functions you take the square root of both sides to solve for x but what about if one side is cubed. I know you would have to take the cubed root of the function but how do you do this on a

  82. Algebra

    Rationalize the denominator The square root of: (12x^5y^2z^3)/9x^3y^3z

  83. calculus

    Which of the following is a representation of the domain of the expression: h(x) = 12x + 3 / 2- square root of x

  84. algebra

    24x^4-12x^3+48x^2/-4x 24x^4-12x^3+12(-1) 24x^4-12x^3+(-12x) 2x^4-12x^3-12x check this problem for me please

  85. Math

    Posted by NEED HELP on Monday, September 29, 2014 at 9:12pm. Have three problems and I'm really confused how to solve/simplify 1. 4/3+square root of 5 2. -4/-4+4square root of 2 3. 1/1+ square root of 2

  86. maths surds please help and explain

    Simplify A.1/root a +2 b.root 18/25 c.root a x cubed root a d.root x + 2 root y/root x-2 root y e.root5 x root72 /root 3

  87. Algebra

    Can someone please check my work for me. Q: Plot the graph of the equations 2x - 3y = 5 and 4x - 6y = 21 and interpret the result. A: 6(2x ¨C 3y = 5) = 12x ¨C 18y = 30 3(4x - 6y = 21) = 12x - 18y = 63 12x ¨C 18y = 30 + 12x - 18y = 63 0 ¡Ù 93

  88. Math

    Rationalize the denominator. Assume that all expressions under radicals represent positive numbers. The square root of 3y^4 to the third root divided by the square root of 15x^4 to the third root. Here is what I have so far: I multiplied. The square root

  89. Algebra 1

    Solve for x sq root 2x+3= sq root 6x-1 a-1 b-2 c-3 dsq root 6 My answer is a = 1

  90. algebra 1

    This problem has a fraction in it. Solve: square root of y =(numerator) 5+square root of 2. (Denominator)2 25.5+5square root of 2?

  91. math

    solve algebraically and check y=8x+3 y=-4x-21 8x+3=-4x-21 +4x +4x 12x+3=-21 -3 -3 12x=-24 x=-2 y=8x+3 y=8(-2)+3 y=-16+3 y=-13 (-2,-13) check y=8x+3 -13=8(-2)+3 -13=-16+3 -13=-13 y=-4x-21 -13=-4(-2)-21 -13=8-21 so -13=-13 these check, so did I do this

  92. Algebra

    Can you explain how to find the solution of 3x^2-2x+5, using the quadratic formula? I got it down to (2 +/- sq. root of -56)/6. But my book then reduces that to (2 +/- 2 times the sq. root of 14i)/6. But I think in place of the 2 and the sq. root of 14 it

  93. math

    2.)If f(x)=3x,g(x)=x-3,and h(x)= the square root of x, find (fogox)(X). I really didn't get this will someone please show me how to do it? This I what I did to solve for it: 3(x-3) 3(he square root of 25-3 3(5-3) 15-9=6 Ok here is another way I solved for

  94. Algebra

    If a is a real number and a cubic equation f(x)=x^3−12x^2+(a+20)x−2a has a repeated root, what is the sum of all the possible values of a ?

  95. Algebra

    Have three problems and I'm really confused how to solve/simplify 1. 4/3+square root of 5 2. -4/-4+4square root of 2 3. 1/1+ square root of 2

  96. Algebra

    What is the domain of the function f(x) = square root of (12x-24) I don't get this concept and I have a ton of these problems-can you please explain how to get it Thank you

  97. Calculus

    Find two non-intersecting intervals where f(x) +12x^4 + 50x^3 + 80x^2-100 has at least one root. Justify your answer.

  98. Math

    Hi again, I don't know how to solve this problem. cube root of(cube roof of(x-1)-1) It would be ninth root of 1/(x-1) Thank you. Do you think you can explain to me how did you solve it? what are your feelings about math, rate your math anxiety, and

  99. Algebra: Steve

    I already asked this question,I just wanted to clarify the answer. Problem: The polynomial f(x) has degree 3. If f(-1)=15, f(0)=0, f(1)=-5, f(2)=12, then what are the x-intercepts of the graph of f? Steve: clearly, f(0) = 0 so, f(x) = ax^3+bx^2+cx =

  100. math

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