X*X+8X=20

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


Simplifying
X * X + 8X = 20

Multiply X * X
X2 + 8X = 20

Reorder the terms:
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:

| 3X+1=6X+8 | | -4=s+3 | | -12z+(-9z)= | | 6n+2=6-4n+8n | | 4/5x+5+17 | | X^3+8x^2+5x=-40 | | -3-4y=21 | | z-100+z=50+z-100-20 | | 0=-4.9t^2+24t-13 | | 401.92=170+1.04x | | 9m(5)=(m+12)9 | | X^3+8x^2+5z=-40 | | 2/9(s-3)=1/3(2s+5) | | n^2=350 | | 2/5x+5=-3/5x-4 | | -3(1+4k)=4-7(1-6k) | | ax-b=9c | | (2a-5)(3a+7)=0 | | -5=p/3 | | 14-(2q+5)=-2q+1-5a | | 9x+10=8x | | =63x^2+144+81 | | x^2-10-100=0 | | 6=3x^2+144+81 | | 3/5x=15/2 | | X*(X+8)=20 | | -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) |

Equations solver categories