-10r^2+3.6=0

Solution for -10r^2+3.6=0 equation:

Simplifying
-10r2 + 3.6 = 0

Reorder the terms:
3.6 + -10r2 = 0

Solving
3.6 + -10r2 = 0

Solving for variable 'r'.

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

Add '-3.6' to each side of the equation.
3.6 + -3.6 + -10r2 = 0 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + -10r2 = 0 + -3.6
-10r2 = 0 + -3.6

Combine like terms: 0 + -3.6 = -3.6
-10r2 = -3.6

Divide each side by '-10'.
r2 = 0.36

Simplifying
r2 = 0.36

Take the square root of each side:
r = {-0.6, 0.6}