2x(x-12)=90

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Solution for 2x(x-12)=90 equation:


Simplifying
2x(x + -12) = 90

Reorder the terms:
2x(-12 + x) = 90
(-12 * 2x + x * 2x) = 90
(-24x + 2x2) = 90

Solving
-24x + 2x2 = 90

Solving for variable 'x'.

Reorder the terms:
-90 + -24x + 2x2 = 90 + -90

Combine like terms: 90 + -90 = 0
-90 + -24x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-45 + -12x + x2) = 0

Factor a trinomial.
2((-3 + -1x)(15 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-3 + -1x)' equal to zero and attempt to solve: Simplifying -3 + -1x = 0 Solving -3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1x = 0 + 3 -1x = 0 + 3 Combine like terms: 0 + 3 = 3 -1x = 3 Divide each side by '-1'. x = -3 Simplifying x = -3

Subproblem 2

Set the factor '(15 + -1x)' equal to zero and attempt to solve: Simplifying 15 + -1x = 0 Solving 15 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + -1x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -1x = 0 + -15 -1x = 0 + -15 Combine like terms: 0 + -15 = -15 -1x = -15 Divide each side by '-1'. x = 15 Simplifying x = 15

Solution

x = {-3, 15}

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