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Simplifying
9r2 + 4 = 112
Reorder the terms:
4 + 9r2 = 112
Solving
4 + 9r2 = 112
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + 9r2 = 112 + -4
Combine like terms: 4 + -4 = 0
0 + 9r2 = 112 + -4
9r2 = 112 + -4
Combine like terms: 112 + -4 = 108
9r2 = 108
Divide each side by '9'.
r2 = 12
Simplifying
r2 = 12
Take the square root of each side:
r = {-3.464101615, 3.464101615}
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