X^2-12-138=0

Solution for X^2-12-138=0 equation:

Simplifying
X2 + -12 + -138 = 0

Reorder the terms:
-12 + -138 + X2 = 0

Combine like terms: -12 + -138 = -150
-150 + X2 = 0

Solving
-150 + X2 = 0

Solving for variable 'X'.

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

Add '150' to each side of the equation.
-150 + 150 + X2 = 0 + 150

Combine like terms: -150 + 150 = 0
0 + X2 = 0 + 150
X2 = 0 + 150

Combine like terms: 0 + 150 = 150
X2 = 150

Simplifying
X2 = 150

Take the square root of each side:
X = {-12.247448714, 12.247448714}