-10-2r^2=-82

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Solution for -10-2r^2=-82 equation: 


Simplifying
-10 + -2r2 = -82

Solving
-10 + -2r2 = -82

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 + -2r2 = -82 + 10

Combine like terms: -10 + 10 = 0
0 + -2r2 = -82 + 10
-2r2 = -82 + 10

Combine like terms: -82 + 10 = -72
-2r2 = -72

Divide each side by '-2'.
r2 = 36

Simplifying
r2 = 36

Take the square root of each side:
r = {-6, 6}

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