x*x-256=0

Solution for x*x-256=0 equation:

Simplifying
x * x + -256 = 0

Multiply x * x
x2 + -256 = 0

Reorder the terms:
-256 + x2 = 0

Solving
-256 + x2 = 0

Solving for variable 'x'.

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

Add '256' to each side of the equation.
-256 + 256 + x2 = 0 + 256

Combine like terms: -256 + 256 = 0
0 + x2 = 0 + 256
x2 = 0 + 256

Combine like terms: 0 + 256 = 256
x2 = 256

Simplifying
x2 = 256

Take the square root of each side:
x = {-16, 16}