144=x(x-18)

Solution for 144=x(x-18) equation:

Simplifying
144 = x(x + -18)

Reorder the terms:
144 = x(-18 + x)
144 = (-18 * x + x * x)
144 = (-18x + x2)

Solving
144 = -18x + x2

Solving for variable 'x'.

Reorder the terms:
144 + 18x + -1x2 = -18x + 18x + x2 + -1x2

Combine like terms: -18x + 18x = 0
144 + 18x + -1x2 = 0 + x2 + -1x2
144 + 18x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
144 + 18x + -1x2 = 0

Factor a trinomial.
(24 + -1x)(6 + x) = 0

Subproblem 1
Set the factor '(24 + -1x)' equal to zero and attempt to solve:

Simplifying
24 + -1x = 0

Solving
24 + -1x = 0

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

Add '-24' to each side of the equation.
24 + -24 + -1x = 0 + -24

Combine like terms: 24 + -24 = 0
0 + -1x = 0 + -24
-1x = 0 + -24

Combine like terms: 0 + -24 = -24
-1x = -24

Divide each side by '-1'.
x = 24

Simplifying
x = 24
Subproblem 2
Set the factor '(6 + x)' equal to zero and attempt to solve:

Simplifying
6 + x = 0

Solving
6 + x = 0

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

Add '-6' to each side of the equation.
6 + -6 + x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + x = 0 + -6
x = 0 + -6

Combine like terms: 0 + -6 = -6
x = -6

Simplifying
x = -6
Solution
x = {24, -6}