2x^2+8x+16=400

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Solution for 2x^2+8x+16=400 equation:


Simplifying
2x2 + 8x + 16 = 400

Reorder the terms:
16 + 8x + 2x2 = 400

Solving
16 + 8x + 2x2 = 400

Solving for variable 'x'.

Reorder the terms:
16 + -400 + 8x + 2x2 = 400 + -400

Combine like terms: 16 + -400 = -384
-384 + 8x + 2x2 = 400 + -400

Combine like terms: 400 + -400 = 0
-384 + 8x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-192 + 4x + x2) = 0

Factor a trinomial.
2((-16 + -1x)(12 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-16 + -1x)' equal to zero and attempt to solve: Simplifying -16 + -1x = 0 Solving -16 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + -1x = 0 + 16 Combine like terms: -16 + 16 = 0 0 + -1x = 0 + 16 -1x = 0 + 16 Combine like terms: 0 + 16 = 16 -1x = 16 Divide each side by '-1'. x = -16 Simplifying x = -16

Subproblem 2

Set the factor '(12 + -1x)' equal to zero and attempt to solve: Simplifying 12 + -1x = 0 Solving 12 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -1x = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -1x = 0 + -12 -1x = 0 + -12 Combine like terms: 0 + -12 = -12 -1x = -12 Divide each side by '-1'. x = 12 Simplifying x = 12

Solution

x = {-16, 12}

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