-4x(x-4)-28=-12

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Solution for -4x(x-4)-28=-12 equation:


Simplifying
-4x(x + -4) + -28 = -12

Reorder the terms:
-4x(-4 + x) + -28 = -12
(-4 * -4x + x * -4x) + -28 = -12
(16x + -4x2) + -28 = -12

Reorder the terms:
-28 + 16x + -4x2 = -12

Solving
-28 + 16x + -4x2 = -12

Solving for variable 'x'.

Reorder the terms:
-28 + 12 + 16x + -4x2 = -12 + 12

Combine like terms: -28 + 12 = -16
-16 + 16x + -4x2 = -12 + 12

Combine like terms: -12 + 12 = 0
-16 + 16x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-4 + 4x + -1x2) = 0

Factor a trinomial.
4((-2 + x)(2 + -1x)) = 0

Ignore the factor 4.

Subproblem 1

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

Subproblem 2

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 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 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {2, 2}

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