64a^2-81=0

Solution for 64a^2-81=0 equation:

Simplifying
64a2 + -81 = 0

Reorder the terms:
-81 + 64a2 = 0

Solving
-81 + 64a2 = 0

Solving for variable 'a'.

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

Add '81' to each side of the equation.
-81 + 81 + 64a2 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + 64a2 = 0 + 81
64a2 = 0 + 81

Combine like terms: 0 + 81 = 81
64a2 = 81

Divide each side by '64'.
a2 = 1.265625

Simplifying
a2 = 1.265625

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