20x^2-86x-18=0

Simple and best practice solution for 20x^2-86x-18=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 20x^2-86x-18=0 equation:


Simplifying
20x2 + -86x + -18 = 0

Reorder the terms:
-18 + -86x + 20x2 = 0

Solving
-18 + -86x + 20x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-9 + -43x + 10x2) = 0

Factor a trinomial.
2((-1 + -5x)(9 + -2x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-1 + -5x)' equal to zero and attempt to solve: Simplifying -1 + -5x = 0 Solving -1 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -5x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -5x = 0 + 1 -5x = 0 + 1 Combine like terms: 0 + 1 = 1 -5x = 1 Divide each side by '-5'. x = -0.2 Simplifying x = -0.2

Subproblem 2

Set the factor '(9 + -2x)' equal to zero and attempt to solve: Simplifying 9 + -2x = 0 Solving 9 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -2x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -2x = 0 + -9 -2x = 0 + -9 Combine like terms: 0 + -9 = -9 -2x = -9 Divide each side by '-2'. x = 4.5 Simplifying x = 4.5

Solution

x = {-0.2, 4.5}

See similar equations:

| -5(x-6)-x=-18 | | 11z-8=42+7 | | 75x^2+120x+48=0 | | -(8q-5)=3q+16 | | 18k^2+196k+160=0 | | 10x+18=7g | | 16p^4-100q^2=0 | | 12x^3+39x^2-36x=0 | | -2z+3+7z=-64 | | 9x-2y=20whats | | 2abc= | | 6n^3-5n^2-56n=0 | | 14=x(5x-3) | | 72=x(2x-7) | | 3x-2y+z=19 | | 110=x*0.81 | | 3t^2-8t=16 | | 9x-2y=20whatsy | | 45=x+3+x+5+x^2-3x+4x-3 | | 4-3=-26 | | 17-56=10-63 | | P=8x-4y | | 2x+y+3z=8 | | 1.5x+1.55=2.1 | | -26=4-3y | | y=x-(x*0.27)+(x*0.09) | | ln(2x)-5ln(x)=0 | | 7n+9=2.5n | | 3y+5z=99 | | 1x+3y+5z=100 | | 2x+3y+z=11 | | 9-4(2y-1)=45 |

Equations solver categories