408.0744=30.3*r^2

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Solution for 408.0744=30.3*r^2 equation: 


Simplifying
408.0744 = 30.3r2

Solving
408.0744 = 30.3r2

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-30.3r2' to each side of the equation.
408.0744 + -30.3r2 = 30.3r2 + -30.3r2

Combine like terms: 30.3r2 + -30.3r2 = 0.0
408.0744 + -30.3r2 = 0.0

Add '-408.0744' to each side of the equation.
408.0744 + -408.0744 + -30.3r2 = 0.0 + -408.0744

Combine like terms: 408.0744 + -408.0744 = 0.0000
0.0000 + -30.3r2 = 0.0 + -408.0744
-30.3r2 = 0.0 + -408.0744

Combine like terms: 0.0 + -408.0744 = -408.0744
-30.3r2 = -408.0744

Divide each side by '-30.3'.
r2 = 13.46780198

Simplifying
r2 = 13.46780198

Take the square root of each side:
r = {-3.669850403, 3.669850403}

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