64x^2-72=9

Solution for 64x^2-72=9 equation:

Simplifying
64x2 + -72 = 9

Reorder the terms:
-72 + 64x2 = 9

Solving
-72 + 64x2 = 9

Solving for variable 'x'.

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

Add '72' to each side of the equation.
-72 + 72 + 64x2 = 9 + 72

Combine like terms: -72 + 72 = 0
0 + 64x2 = 9 + 72
64x2 = 9 + 72

Combine like terms: 9 + 72 = 81
64x2 = 81

Divide each side by '64'.
x2 = 1.265625

Simplifying
x2 = 1.265625

Take the square root of each side:
x = {-1.125, 1.125}