Math

posted by .

x^3 + 8x^2 = 20x

How do I find the root of ^ that equation?

2x^2-10x+12 = 0

^ I found that one by...

2(x-3)(x-2)
x-3 = 0
x = 3
x-2 = 0
x =2

^ Is that the correct way to solve for that one?

  • Math -

    Your solution to the second equation is correct, and the procedure also.

    For the first equation, think of it as:
    x^3 + 8x^2 = 20x
    x^3 + 8x^2 - 20x = 0
    x(x^2 + 8x - 20) = 0
    then x=0 is a solution, and you can get two more solutions from the part in parentheses in a similar way to the second equation.

  • Math -

    Thanks so much MathMate =)

  • Math -

    You're welcome, and keep up the good work!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math,factoring,help

    Can someone please show me step by step how to do these. I've read the book and there examples and It is just not clicking. Directions: Factor each of the following polynomials completely Problem:#1 14x^2-20x+6 Directions:Find all …
  2. Math

    Find the equation of the tangent line 5x^2+y^2=14 at (1,3). P.S: It's calculus. So far I know this much 10x+2y(dy/dx)=o -10x -10x ___________________ 2y(dy/dx)= -10x (dy/dx)= -10x/2y= -5x/y m= -5(1)/3= -5/3 y=mx+b 3= -5/3(1)+b then …
  3. Math

    solve the equation 20x^3 +44x^2 -17x -5 given that -5/2 is a zero of f(x) 20x^3 +44x^2 -17x -5 I used synthetic division and got 20x^2-6x-2=0 took 2 and divided it out of that equation 2(x+5/2)=10x^2 -3x-1 then i factored it out the …
  4. Math

    x^3 + 8x^2 = 20x How do I find the root of ^ that equation?
  5. maths

    x^2 - 20x +c =0 one of the root of the equation is the three times the other, find the values of c and the roots
  6. Math Help!

    1. Find the product. (2x)(10x) 20x 12x 20x^2 5x 2. -3m(m + 8) -3m^2 + 24 -3m^2 + 24m -24m^2 -4m + 5 3. 4d(2d - 9) 8d - 36d -d -28d^2 8d^2 - 36d
  7. algebra

    Find the product (2x)(10x) Answers: 20x 12x 20x^2 5x
  8. math

    Find the product. (2x)(10x) A.20x B.12x C.20x^2 D.-5x Is the answer A?
  9. Algebra

    equations and inequalities unit test for questions 1-5, solve the equation 4. 3(4-2x)=-2x (1 point) a. -1*** b. 1 c. 2 d. 3 5. 5.4+0.2x=-1.4x+8.6 a. 2 b. -2 c. .2*** d. 20 For questions 6-7, simplify the expression 6. -4 - 5(x+8) a.-5x …
  10. math

    1. (2x)(10x) a. 20x b.12x c.20x^2 d.5x** 2. -3m(m+8) a. -3m^2+24 b. -3m^2-24m c. -24m^2** d. -4m+5 3. 4d(2d-9) a.8d-36d** b.-d c.-28d^2 d. 8d^2-36d 4. find the product 5b(6b-10) a. 11b-10 b. 5b^2+6b-10** c. -b-10 d. 30b^2-50b

More Similar Questions