r^2+5=86

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Solution for r^2+5=86 equation: 


Simplifying
r2 + 5 = 86

Reorder the terms:
5 + r2 = 86

Solving
5 + r2 = 86

Solving for variable 'r'.

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

Add '-5' to each side of the equation.
5 + -5 + r2 = 86 + -5

Combine like terms: 5 + -5 = 0
0 + r2 = 86 + -5
r2 = 86 + -5

Combine like terms: 86 + -5 = 81
r2 = 81

Simplifying
r2 = 81

Take the square root of each side:
r = {-9, 9}

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