0=r^2+18.5-32

Solution for 0=r^2+18.5-32 equation:

Simplifying
0 = r2 + 18.5 + -32

Reorder the terms:
0 = 18.5 + -32 + r2

Combine like terms: 18.5 + -32 = -13.5
0 = -13.5 + r2

Solving
0 = -13.5 + r2

Solving for variable 'r'.

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

Add '-1r2' to each side of the equation.
0 + -1r2 = -13.5 + r2 + -1r2
Remove the zero:
-1r2 = -13.5 + r2 + -1r2

Combine like terms: r2 + -1r2 = 0
-1r2 = -13.5 + 0
-1r2 = -13.5

Divide each side by '-1'.
r2 = 13.5

Simplifying
r2 = 13.5

Take the square root of each side:
r = {-3.674234614, 3.674234614}