45r^2-320=

Solution for 45r^2-320= equation:

Simplifying
45r2 + -320 = 0

Reorder the terms:
-320 + 45r2 = 0

Solving
-320 + 45r2 = 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 + 45r2 = 0 + 320

Combine like terms: -320 + 320 = 0
0 + 45r2 = 0 + 320
45r2 = 0 + 320

Combine like terms: 0 + 320 = 320
45r2 = 320

Divide each side by '45'.
r2 = 7.111111111

Simplifying
r2 = 7.111111111

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