r^2-75=0

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Solution for r^2-75=0 equation: 


Simplifying
r2 + -75 = 0

Reorder the terms:
-75 + r2 = 0

Solving
-75 + r2 = 0

Solving for variable 'r'.

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

Add '75' to each side of the equation.
-75 + 75 + r2 = 0 + 75

Combine like terms: -75 + 75 = 0
0 + r2 = 0 + 75
r2 = 0 + 75

Combine like terms: 0 + 75 = 75
r2 = 75

Simplifying
r2 = 75

Take the square root of each side:
r = {-8.660254038, 8.660254038}

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