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Simplifying
r2 + 18 + 16 = 4r2
Reorder the terms:
18 + 16 + r2 = 4r2
Combine like terms: 18 + 16 = 34
34 + r2 = 4r2
Solving
34 + r2 = 4r2
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-4r2' to each side of the equation.
34 + r2 + -4r2 = 4r2 + -4r2
Combine like terms: r2 + -4r2 = -3r2
34 + -3r2 = 4r2 + -4r2
Combine like terms: 4r2 + -4r2 = 0
34 + -3r2 = 0
Add '-34' to each side of the equation.
34 + -34 + -3r2 = 0 + -34
Combine like terms: 34 + -34 = 0
0 + -3r2 = 0 + -34
-3r2 = 0 + -34
Combine like terms: 0 + -34 = -34
-3r2 = -34
Divide each side by '-3'.
r2 = 11.33333333
Simplifying
r2 = 11.33333333
Take the square root of each side:
r = {-3.366501646, 3.366501646}
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