2x(2x+6)=720

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Solution for 2x(2x+6)=720 equation:


Simplifying
2x(2x + 6) = 720

Reorder the terms:
2x(6 + 2x) = 720
(6 * 2x + 2x * 2x) = 720
(12x + 4x2) = 720

Solving
12x + 4x2 = 720

Solving for variable 'x'.

Reorder the terms:
-720 + 12x + 4x2 = 720 + -720

Combine like terms: 720 + -720 = 0
-720 + 12x + 4x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-180 + 3x + x2) = 0

Factor a trinomial.
4((-15 + -1x)(12 + -1x)) = 0

Ignore the factor 4.

Subproblem 1

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

Subproblem 2

Set the factor '(12 + -1x)' equal to zero and attempt to solve: Simplifying 12 + -1x = 0 Solving 12 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -1x = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -1x = 0 + -12 -1x = 0 + -12 Combine like terms: 0 + -12 = -12 -1x = -12 Divide each side by '-1'. x = 12 Simplifying x = 12

Solution

x = {-15, 12}

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