x^2-4-12=0

Solution for x^2-4-12=0 equation:

Simplifying
x2 + -4 + -12 = 0

Reorder the terms:
-4 + -12 + x2 = 0

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

Solving
-16 + x2 = 0

Solving for variable 'x'.

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

Add '16' to each side of the equation.
-16 + 16 + x2 = 0 + 16

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

Combine like terms: 0 + 16 = 16
x2 = 16

Simplifying
x2 = 16

Take the square root of each side:
x = {-4, 4}