0=r(r)-23.04

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Solution for 0=r(r)-23.04 equation: 


Simplifying
0 = r(r) + -23.04

Multiply r * r
0 = r2 + -23.04

Reorder the terms:
0 = -23.04 + r2

Solving
0 = -23.04 + r2

Solving for variable 'r'.

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

Add '-1r2' to each side of the equation.
0 + -1r2 = -23.04 + r2 + -1r2
Remove the zero:
-1r2 = -23.04 + r2 + -1r2

Combine like terms: r2 + -1r2 = 0
-1r2 = -23.04 + 0
-1r2 = -23.04

Divide each side by '-1'.
r2 = 23.04

Simplifying
r2 = 23.04

Take the square root of each side:
r = {-4.8, 4.8}

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