0=8x^2-72

Solution for 0=8x^2-72 equation:

Simplifying
0 = 8x2 + -72

Reorder the terms:
0 = -72 + 8x2

Solving
0 = -72 + 8x2

Solving for variable 'x'.

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

Add '-8x2' to each side of the equation.
0 + -8x2 = -72 + 8x2 + -8x2
Remove the zero:
-8x2 = -72 + 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
-8x2 = -72 + 0
-8x2 = -72

Divide each side by '-8'.
x2 = 9

Simplifying
x2 = 9

Take the square root of each side:
x = {-3, 3}