9z^2-64=

Solution for 9z^2-64= equation:

Simplifying
9z2 + -64 = 0

Reorder the terms:
-64 + 9z2 = 0

Solving
-64 + 9z2 = 0

Solving for variable 'z'.

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

Add '64' to each side of the equation.
-64 + 64 + 9z2 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + 9z2 = 0 + 64
9z2 = 0 + 64

Combine like terms: 0 + 64 = 64
9z2 = 64

Divide each side by '9'.
z2 = 7.111111111

Simplifying
z2 = 7.111111111

Take the square root of each side:
z = {-2.666666667, 2.666666667}