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Simplifying
64r2 + -121 = 0
Reorder the terms:
-121 + 64r2 = 0
Solving
-121 + 64r2 = 0
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '121' to each side of the equation.
-121 + 121 + 64r2 = 0 + 121
Combine like terms: -121 + 121 = 0
0 + 64r2 = 0 + 121
64r2 = 0 + 121
Combine like terms: 0 + 121 = 121
64r2 = 121
Divide each side by '64'.
r2 = 1.890625
Simplifying
r2 = 1.890625
Take the square root of each side:
r = {-1.375, 1.375}
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