2x*(x+5)=72

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Solution for 2x*(x+5)=72 equation:


Simplifying
2x(x + 5) = 72

Reorder the terms:
2x(5 + x) = 72
(5 * 2x + x * 2x) = 72
(10x + 2x2) = 72

Solving
10x + 2x2 = 72

Solving for variable 'x'.

Reorder the terms:
-72 + 10x + 2x2 = 72 + -72

Combine like terms: 72 + -72 = 0
-72 + 10x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-36 + 5x + x2) = 0

Factor a trinomial.
2((-9 + -1x)(4 + -1x)) = 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 '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-9, 4}

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