9x^2+128-256=0

Solution for 9x^2+128-256=0 equation:

Simplifying
9x2 + 128 + -256 = 0

Reorder the terms:
128 + -256 + 9x2 = 0

Combine like terms: 128 + -256 = -128
-128 + 9x2 = 0

Solving
-128 + 9x2 = 0

Solving for variable 'x'.

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

Add '128' to each side of the equation.
-128 + 128 + 9x2 = 0 + 128

Combine like terms: -128 + 128 = 0
0 + 9x2 = 0 + 128
9x2 = 0 + 128

Combine like terms: 0 + 128 = 128
9x2 = 128

Divide each side by '9'.
x2 = 14.22222222

Simplifying
x2 = 14.22222222

Take the square root of each side:
x = {-3.771236166, 3.771236166}