r^2-10=-1

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Solution for r^2-10=-1 equation: 


Simplifying
r2 + -10 = -1

Reorder the terms:
-10 + r2 = -1

Solving
-10 + r2 = -1

Solving for variable 'r'.

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

Add '10' to each side of the equation.
-10 + 10 + r2 = -1 + 10

Combine like terms: -10 + 10 = 0
0 + r2 = -1 + 10
r2 = -1 + 10

Combine like terms: -1 + 10 = 9
r2 = 9

Simplifying
r2 = 9

Take the square root of each side:
r = {-3, 3}

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