(x+8)(x-18)=0

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Solution for (x+8)(x-18)=0 equation: 


Simplifying
(x + 8)(x + -18) = 0

Reorder the terms:
(8 + x)(x + -18) = 0

Reorder the terms:
(8 + x)(-18 + x) = 0

Multiply (8 + x) * (-18 + x)
(8(-18 + x) + x(-18 + x)) = 0
((-18 * 8 + x * 8) + x(-18 + x)) = 0
((-144 + 8x) + x(-18 + x)) = 0
(-144 + 8x + (-18 * x + x * x)) = 0
(-144 + 8x + (-18x + x2)) = 0

Combine like terms: 8x + -18x = -10x
(-144 + -10x + x2) = 0

Solving
-144 + -10x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-8 + -1x)(18 + -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 '(18 + -1x)' equal to zero and attempt to solve:

Simplifying
18 + -1x = 0

Solving
18 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-18' to each side of the equation.
18 + -18 + -1x = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -1x = 0 + -18
-1x = 0 + -18

Combine like terms: 0 + -18 = -18
-1x = -18

Divide each side by '-1'.
x = 18

Simplifying
x = 18
Solution
x = {-8, 18}

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