r^2+15+56=0

Solution for r^2+15+56=0 equation:

Simplifying
r2 + 15 + 56 = 0

Reorder the terms:
15 + 56 + r2 = 0

Combine like terms: 15 + 56 = 71
71 + r2 = 0

Solving
71 + r2 = 0

Solving for variable 'r'.

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

Add '-71' to each side of the equation.
71 + -71 + r2 = 0 + -71

Combine like terms: 71 + -71 = 0
0 + r2 = 0 + -71
r2 = 0 + -71

Combine like terms: 0 + -71 = -71
r2 = -71

Simplifying
r2 = -71

Reorder the terms:
71 + r2 = -71 + 71

Combine like terms: -71 + 71 = 0
71 + r2 = 0

The solution to this equation could not be determined.