(x+8)(x-9)=0

Solution for (x+8)(x-9)=0 equation:

Simplifying
(x + 8)(x + -9) = 0

Reorder the terms:
(8 + x)(x + -9) = 0

Reorder the terms:
(8 + x)(-9 + x) = 0

Multiply (8 + x) * (-9 + x)
(8(-9 + x) + x(-9 + x)) = 0
((-9 * 8 + x * 8) + x(-9 + x)) = 0
((-72 + 8x) + x(-9 + x)) = 0
(-72 + 8x + (-9 * x + x * x)) = 0
(-72 + 8x + (-9x + x2)) = 0

Combine like terms: 8x + -9x = -1x
(-72 + -1x + x2) = 0

Solving
-72 + -1x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-8 + -1x)(9 + -1x) = 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 '(9 + -1x)' equal to zero and attempt to solve:

Simplifying
9 + -1x = 0

Solving
9 + -1x = 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 + -1x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -1x = 0 + -9
-1x = 0 + -9

Combine like terms: 0 + -9 = -9
-1x = -9

Divide each side by '-1'.
x = 9

Simplifying
x = 9
Solution
x = {-8, 9}