X*(X+8)=20

Simple and best practice solution for X*(X+8)=20 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 X*(X+8)=20 equation:


Simplifying
X(X + 8) = 20

Reorder the terms:
X(8 + X) = 20
(8 * X + X * X) = 20
(8X + X2) = 20

Solving
8X + X2 = 20

Solving for variable 'X'.

Reorder the terms:
-20 + 8X + X2 = 20 + -20

Combine like terms: 20 + -20 = 0
-20 + 8X + X2 = 0

Factor a trinomial.
(-10 + -1X)(2 + -1X) = 0

Subproblem 1

Set the factor '(-10 + -1X)' equal to zero and attempt to solve: Simplifying -10 + -1X = 0 Solving -10 + -1X = 0 Move all terms containing X to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + -1X = 0 + 10 Combine like terms: -10 + 10 = 0 0 + -1X = 0 + 10 -1X = 0 + 10 Combine like terms: 0 + 10 = 10 -1X = 10 Divide each side by '-1'. X = -10 Simplifying X = -10

Subproblem 2

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

Solution

X = {-10, 2}

See similar equations:

| -41=4+5x | | 2(7+8x)+4(3x-8)= | | 15=-2n-3n | | 3/4(2r+5)-5/8(3r-1)=1 | | -9(x+4)+56=-3x+4 | | 6(5b+3)=5(3b+7) | | x-10+x-11+y=180 | | 3=7(1-7k)-4 | | -3x^2-1x=0 | | 9x-x=56 | | 1/4(x+20)=30 | | a/3-1/a=8a+7/24 | | -2/3(-3) | | 1/3(n+4)-6=-2 | | 3(x-5)=-7 | | -9u^2+21u-14=0 | | 3(19)= | | 6x^2=6-5x | | 6(1/2w+4)=0 | | 5y+2(y-4)=8y-3(y-10) | | 0.6x-0.2(5-x)=1.8 | | -2(1+6m)=-27-7m | | B=85+15+8(w) | | 5(2-2y)=5(2y-2) | | -20=-2+8(v+7) | | (x+2)+3x=128 | | 1/3(7a-1) | | -10.5=.5x | | -155=-5(5x+6) | | 3/2p+2=4 | | 63-1x=3+2x | | b/9-6=-7 |

Equations solver categories