5r^2-320=0

Solution for 5r^2-320=0 equation:

Simplifying
5r2 + -320 = 0

Reorder the terms:
-320 + 5r2 = 0

Solving
-320 + 5r2 = 0

Solving for variable 'r'.

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

Add '320' to each side of the equation.
-320 + 320 + 5r2 = 0 + 320

Combine like terms: -320 + 320 = 0
0 + 5r2 = 0 + 320
5r2 = 0 + 320

Combine like terms: 0 + 320 = 320
5r2 = 320

Divide each side by '5'.
r2 = 64

Simplifying
r2 = 64

Take the square root of each side:
r = {-8, 8}