x^2+6x+15=7

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Solution for x^2+6x+15=7 equation:


Simplifying
x2 + 6x + 15 = 7

Reorder the terms:
15 + 6x + x2 = 7

Solving
15 + 6x + x2 = 7

Solving for variable 'x'.

Reorder the terms:
15 + -7 + 6x + x2 = 7 + -7

Combine like terms: 15 + -7 = 8
8 + 6x + x2 = 7 + -7

Combine like terms: 7 + -7 = 0
8 + 6x + x2 = 0

Factor a trinomial.
(4 + x)(2 + x) = 0

Subproblem 1

Set the factor '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 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 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4

Subproblem 2

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {-4, -2}

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