x^2-16=3x-12

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Solution for x^2-16=3x-12 equation: 


Simplifying
x2 + -16 = 3x + -12

Reorder the terms:
-16 + x2 = 3x + -12

Reorder the terms:
-16 + x2 = -12 + 3x

Solving
-16 + x2 = -12 + 3x

Solving for variable 'x'.

Reorder the terms:
-16 + 12 + -3x + x2 = -12 + 3x + 12 + -3x

Combine like terms: -16 + 12 = -4
-4 + -3x + x2 = -12 + 3x + 12 + -3x

Reorder the terms:
-4 + -3x + x2 = -12 + 12 + 3x + -3x

Combine like terms: -12 + 12 = 0
-4 + -3x + x2 = 0 + 3x + -3x
-4 + -3x + x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-4 + -3x + x2 = 0

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


Subproblem 1
Set the factor '(-1 + -1x)' equal to zero and attempt to solve:

Simplifying
-1 + -1x = 0

Solving
-1 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '1' to each side of the equation.
-1 + 1 + -1x = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -1x = 0 + 1
-1x = 0 + 1

Combine like terms: 0 + 1 = 1
-1x = 1

Divide each side by '-1'.
x = -1

Simplifying
x = -1

Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve:

Simplifying
4 + -1x = 0

Solving
4 + -1x = 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 + -1x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = 0 + -4
-1x = 0 + -4

Combine like terms: 0 + -4 = -4
-1x = -4

Divide each side by '-1'.
x = 4

Simplifying
x = 4
Solution
x = {-1, 4}

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