2x-18=(2x-18)(2x+6)

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Solution for 2x-18=(2x-18)(2x+6) equation:


Simplifying
2x + -18 = (2x + -18)(2x + 6)

Reorder the terms:
-18 + 2x = (2x + -18)(2x + 6)

Reorder the terms:
-18 + 2x = (-18 + 2x)(2x + 6)

Reorder the terms:
-18 + 2x = (-18 + 2x)(6 + 2x)

Multiply (-18 + 2x) * (6 + 2x)
-18 + 2x = (-18(6 + 2x) + 2x * (6 + 2x))
-18 + 2x = ((6 * -18 + 2x * -18) + 2x * (6 + 2x))
-18 + 2x = ((-108 + -36x) + 2x * (6 + 2x))
-18 + 2x = (-108 + -36x + (6 * 2x + 2x * 2x))
-18 + 2x = (-108 + -36x + (12x + 4x2))

Combine like terms: -36x + 12x = -24x
-18 + 2x = (-108 + -24x + 4x2)

Solving
-18 + 2x = -108 + -24x + 4x2

Solving for variable 'x'.

Reorder the terms:
-18 + 108 + 2x + 24x + -4x2 = -108 + -24x + 4x2 + 108 + 24x + -4x2

Combine like terms: -18 + 108 = 90
90 + 2x + 24x + -4x2 = -108 + -24x + 4x2 + 108 + 24x + -4x2

Combine like terms: 2x + 24x = 26x
90 + 26x + -4x2 = -108 + -24x + 4x2 + 108 + 24x + -4x2

Reorder the terms:
90 + 26x + -4x2 = -108 + 108 + -24x + 24x + 4x2 + -4x2

Combine like terms: -108 + 108 = 0
90 + 26x + -4x2 = 0 + -24x + 24x + 4x2 + -4x2
90 + 26x + -4x2 = -24x + 24x + 4x2 + -4x2

Combine like terms: -24x + 24x = 0
90 + 26x + -4x2 = 0 + 4x2 + -4x2
90 + 26x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
90 + 26x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(45 + 13x + -2x2) = 0

Factor a trinomial.
2((9 + -1x)(5 + 2x)) = 0

Ignore the factor 2.

Subproblem 1

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

Subproblem 2

Set the factor '(5 + 2x)' equal to zero and attempt to solve: Simplifying 5 + 2x = 0 Solving 5 + 2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 2x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 2x = 0 + -5 2x = 0 + -5 Combine like terms: 0 + -5 = -5 2x = -5 Divide each side by '2'. x = -2.5 Simplifying x = -2.5

Solution

x = {9, -2.5}

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