x*x-9=136

Solution for x*x-9=136 equation:

Simplifying
x * x + -9 = 136

Multiply x * x
x2 + -9 = 136

Reorder the terms:
-9 + x2 = 136

Solving
-9 + x2 = 136

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + x2 = 136 + 9

Combine like terms: -9 + 9 = 0
0 + x2 = 136 + 9
x2 = 136 + 9

Combine like terms: 136 + 9 = 145
x2 = 145

Simplifying
x2 = 145

Take the square root of each side:
x = {-12.041594579, 12.041594579}