256=256-16x^2

Solution for 256=256-16x^2 equation:

Simplifying
256 = 256 + -16x2

Add '-256' to each side of the equation.
256 + -256 = 256 + -256 + -16x2

Combine like terms: 256 + -256 = 0
0 = 256 + -256 + -16x2

Combine like terms: 256 + -256 = 0
0 = 0 + -16x2
0 = -16x2

Solving
0 = -16x2

Solving for variable 'x'.

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

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

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

Divide each side by '16'.
x2 = 0

Simplifying
x2 = 0

Take the square root of each side:
x = {0}