posted by .

1. 4x^2-13x=12
I need to solve this problem by factoring or using the quadtratic formula. I am stuck when using the quadtratic formula method. Please advise how to do this.

2. 5x^2+42=0
How many roots exist in this equation and what type are they?

  • math -

    1. 4x^2-13x -12 = 0
    Playing around a bit with the pairs 4&3 and 6&2 as the constants, I get
    (4x + 3)(x -4) = 0
    That makes the roots x=-3/4 and 4

    2. x^2 = -42/5
    There are two imaginary roots that have an "i" (sqrt(-1) factor

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math,help

    i am stuck with this problem: Problem #12 Solve by using the quadratic formula. 5x^2 + 5x = 3 i am at this step x = (-5 (+/-) sqrt (85))/(10) you are done!
  2. Algebra

    Hello all - I would like to check my work on 2 problems. Solve by factoring : x^2-13x= -12 x^2-13x+12= -12 + 12 x^2-13x+12= 0 (x-1)(x-12)= 0 x = 1 , 12 Solve using the square root property: 2x^2-35=15 2x^2-35-15=0 2x^2-50=0 2(x-5)(x+5)=0 …
  3. i need help..algebra/math

    solve by using the quadratic formula: x2 plus x minus 2 equal 0 I know the formula is a=1 b=1 c=2 I'm having trouble solving...please help.
  4. math

    1. solve by using the quadratic formula. 5x^2+x=3 2. solve by completing the square. x^2=5x+2 3.solve by using the square roots method. 5(x-2)^2=3
  5. algebra

    Solve the following equation: k2 + 4k = 0 By factoring and By using the quadratic formula Can someone please help me to understand how to this problem...I do not understand the steps to get the correct answer. Thanks!!!
  6. Math

    I am stuck on a problem that has to do with the double angle formulas. I have to solve this: 4sinxcosx = 1. I tried using the formula 2sinu = 2sinucosu by substituting it in like this: 2(2sinxcosx)= 1 but then I am stuck
  7. Math

    Solve the equation by factoring, by finding square roots, or by using the quadratic formula. 3(x+4)^2= -27
  8. algebra 2

    use quadtratic formula to find any X intercept. y=4x^-5x-4
  9. College Algebra 1

    Using the factoring method, solve for the roots of quadratic equation 4x^2=16
  10. Algebra 1

    Which method is the best method for solving the equation 8x^2-123x+3=0 square roots factoring graphing quadratic formula my answer is quadratic formula

More Similar Questions