315=x^2+6x

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Solution for 315=x^2+6x equation:


Simplifying
315 = x2 + 6x

Reorder the terms:
315 = 6x + x2

Solving
315 = 6x + x2

Solving for variable 'x'.

Reorder the terms:
315 + -6x + -1x2 = 6x + -6x + x2 + -1x2

Combine like terms: 6x + -6x = 0
315 + -6x + -1x2 = 0 + x2 + -1x2
315 + -6x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
315 + -6x + -1x2 = 0

Factor a trinomial.
(15 + -1x)(21 + x) = 0

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 '(21 + x)' equal to zero and attempt to solve: Simplifying 21 + x = 0 Solving 21 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + x = 0 + -21 x = 0 + -21 Combine like terms: 0 + -21 = -21 x = -21 Simplifying x = -21

Solution

x = {15, -21}

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