4k^2-20k-56=0

Simple and best practice solution for 4k^2-20k-56=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 4k^2-20k-56=0 equation:


Simplifying
4k2 + -20k + -56 = 0

Reorder the terms:
-56 + -20k + 4k2 = 0

Solving
-56 + -20k + 4k2 = 0

Solving for variable 'k'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-14 + -5k + k2) = 0

Factor a trinomial.
4((-2 + -1k)(7 + -1k)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-2 + -1k)' equal to zero and attempt to solve: Simplifying -2 + -1k = 0 Solving -2 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1k = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1k = 0 + 2 -1k = 0 + 2 Combine like terms: 0 + 2 = 2 -1k = 2 Divide each side by '-1'. k = -2 Simplifying k = -2

Subproblem 2

Set the factor '(7 + -1k)' equal to zero and attempt to solve: Simplifying 7 + -1k = 0 Solving 7 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1k = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1k = 0 + -7 -1k = 0 + -7 Combine like terms: 0 + -7 = -7 -1k = -7 Divide each side by '-1'. k = 7 Simplifying k = 7

Solution

k = {-2, 7}

See similar equations:

| 0.625=5b^3 | | 3/4-1/8= | | 4x-9+x-11=2(x-4) | | 8(x+2)=12x-4 | | -4z(z+1)(z+4)=0 | | -5(3x-1)=2(4x-6) | | 7p^2-70p+112=0 | | (3x-1)(x+3)+(3x-1)(-2x+12)=0 | | 11x=66 | | -4x^3+4x^2+15x=0 | | 4x^3-40x^2+100x=0 | | 72t^2-12t-24=0 | | 9=0.333333333a+11 | | a+18=6a | | 5x^2-8x+5=0 | | b=rs+r | | 3(2x-1)+4(3x+2)=14 | | 8a^2-16a=0 | | 5(3+4x)-8=127 | | 6m^2+4m-8=0 | | p-5-13p=150-1 | | 8x^2-4x-6=0 | | n^2-2n=15 | | -48x^2+3x^4=0 | | 2p^2-2p-9=0 | | 5=n+1+1 | | x+3x=52 | | -2z+9=-z+10 | | 2p^2-4p+2=0 | | 4=0.2s-7 | | 2n^2+7n-14=0 | | -2r-6r=-8 |

Equations solver categories