64r^2-9=

Solution for 64r^2-9= equation:

Simplifying
64r2 + -9 = 0

Reorder the terms:
-9 + 64r2 = 0

Solving
-9 + 64r2 = 0

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 9 + 64r2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 64r2 = 0 + 9
64r2 = 0 + 9

Combine like terms: 0 + 9 = 9
64r2 = 9

Divide each side by '64'.
r2 = 0.140625

Simplifying
r2 = 0.140625

Take the square root of each side:
r = {-0.375, 0.375}