0=x^2-7x-8

Simple and best practice solution for 0=x^2-7x-8 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 0=x^2-7x-8 equation:


Simplifying
0 = x2 + -7x + -8

Reorder the terms:
0 = -8 + -7x + x2

Solving
0 = -8 + -7x + x2

Solving for variable 'x'.

Combine like terms: 0 + 8 = 8
8 + 7x + -1x2 = -8 + -7x + x2 + 8 + 7x + -1x2

Reorder the terms:
8 + 7x + -1x2 = -8 + 8 + -7x + 7x + x2 + -1x2

Combine like terms: -8 + 8 = 0
8 + 7x + -1x2 = 0 + -7x + 7x + x2 + -1x2
8 + 7x + -1x2 = -7x + 7x + x2 + -1x2

Combine like terms: -7x + 7x = 0
8 + 7x + -1x2 = 0 + x2 + -1x2
8 + 7x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
8 + 7x + -1x2 = 0

Factor a trinomial.
(8 + -1x)(1 + x) = 0

Subproblem 1

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Subproblem 2

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Solution

x = {8, -1}

See similar equations:

| 8x+8=40 | | .05x+.10(140-x)=11.15 | | 18=-z+4 | | 15x^2+15=34x | | 4x+3z=3 | | 0=x^2+2x+9 | | 0=2x^2+4x-3 | | 4x(x+1)=75+x(x+4) | | 21.5=a-1.5 | | -(-9x)=(-37) | | (x-1)(x-1)=4 | | y=x^2-5x-14 | | -16x^2+24x+5=0 | | 4x(x+1)=75+x(x+7) | | 5n^2+20n+15=0 | | 5(x-3)=2(3x-5)-x+2 | | 2a+26=4a-4 | | 13=-z+6 | | 12x+5-3(2x-3)=4(x+5)+2x+6 | | 4x+21=7x-3 | | 5.5=-16t^2+65.5t+5.5 | | x^2+17x+30=0 | | 6h+7k=-1 | | 5x+12-13x=12-2x-13-x | | x^2-20x-69=0 | | 5x+12-13x=12-2x-14 | | 3h-5k=8 | | 3x^3+12x^2-3x=12 | | 3x^3+12x^2-3x-12=0 | | -(-2x)=(-78) | | 8.5=-16t^2+8.5t | | 4k+2p=5 |

Equations solver categories