-x^2+64=0

Solution for -x^2+64=0 equation:

Simplifying
-1x2 + 64 = 0

Reorder the terms:
64 + -1x2 = 0

Solving
64 + -1x2 = 0

Solving for variable 'x'.

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

Add '-64' to each side of the equation.
64 + -64 + -1x2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -1x2 = 0 + -64
-1x2 = 0 + -64

Combine like terms: 0 + -64 = -64
-1x2 = -64

Divide each side by '-1'.
x2 = 64

Simplifying
x2 = 64

Take the square root of each side:
x = {-8, 8}