315=(x+2)(x)*5

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Solution for 315=(x+2)(x)*5 equation:


Simplifying
315 = (x + 2)(x) * 5

Reorder the terms:
315 = (2 + x)(x) * 5

Reorder the terms for easier multiplication:
315 = 5x(2 + x)
315 = (2 * 5x + x * 5x)
315 = (10x + 5x2)

Solving
315 = 10x + 5x2

Solving for variable 'x'.

Reorder the terms:
315 + -10x + -5x2 = 10x + -10x + 5x2 + -5x2

Combine like terms: 10x + -10x = 0
315 + -10x + -5x2 = 0 + 5x2 + -5x2
315 + -10x + -5x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
315 + -10x + -5x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(63 + -2x + -1x2) = 0

Factor a trinomial.
5((7 + -1x)(9 + x)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Subproblem 2

Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 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 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9

Solution

x = {7, -9}

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