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Simplifying
2r2 + -11 = 2
Reorder the terms:
-11 + 2r2 = 2
Solving
-11 + 2r2 = 2
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '11' to each side of the equation.
-11 + 11 + 2r2 = 2 + 11
Combine like terms: -11 + 11 = 0
0 + 2r2 = 2 + 11
2r2 = 2 + 11
Combine like terms: 2 + 11 = 13
2r2 = 13
Divide each side by '2'.
r2 = 6.5
Simplifying
r2 = 6.5
Take the square root of each side:
r = {-2.549509757, 2.549509757}
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