x^2=-8x-16

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Solution for x^2=-8x-16 equation:


Simplifying
x2 = -8x + -16

Reorder the terms:
x2 = -16 + -8x

Solving
x2 = -16 + -8x

Solving for variable 'x'.

Reorder the terms:
16 + 8x + x2 = -16 + -8x + 16 + 8x

Reorder the terms:
16 + 8x + x2 = -16 + 16 + -8x + 8x

Combine like terms: -16 + 16 = 0
16 + 8x + x2 = 0 + -8x + 8x
16 + 8x + x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
16 + 8x + x2 = 0

Factor a trinomial.
(4 + x)(4 + 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 '(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

Solution

x = {-4, -4}

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