r^2+5-66=0

Solution for r^2+5-66=0 equation:

Simplifying
r2 + 5 + -66 = 0

Reorder the terms:
5 + -66 + r2 = 0

Combine like terms: 5 + -66 = -61
-61 + r2 = 0

Solving
-61 + r2 = 0

Solving for variable 'r'.

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

Add '61' to each side of the equation.
-61 + 61 + r2 = 0 + 61

Combine like terms: -61 + 61 = 0
0 + r2 = 0 + 61
r2 = 0 + 61

Combine like terms: 0 + 61 = 61
r2 = 61

Simplifying
r2 = 61

Take the square root of each side:
r = {-7.810249676, 7.810249676}