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Simplifying
3r2 + -119 = -11
Reorder the terms:
-119 + 3r2 = -11
Solving
-119 + 3r2 = -11
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '119' to each side of the equation.
-119 + 119 + 3r2 = -11 + 119
Combine like terms: -119 + 119 = 0
0 + 3r2 = -11 + 119
3r2 = -11 + 119
Combine like terms: -11 + 119 = 108
3r2 = 108
Divide each side by '3'.
r2 = 36
Simplifying
r2 = 36
Take the square root of each side:
r = {-6, 6}
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