64=25r^2

Solution for 64=25r^2 equation:

Simplifying
64 = 25r2

Solving
64 = 25r2

Solving for variable 'r'.

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

Add '-25r2' to each side of the equation.
64 + -25r2 = 25r2 + -25r2

Combine like terms: 25r2 + -25r2 = 0
64 + -25r2 = 0

Add '-64' to each side of the equation.
64 + -64 + -25r2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -25r2 = 0 + -64
-25r2 = 0 + -64

Combine like terms: 0 + -64 = -64
-25r2 = -64

Divide each side by '-25'.
r2 = 2.56

Simplifying
r2 = 2.56

Take the square root of each side:
r = {-1.6, 1.6}