0=4r^2-36

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Solution for 0=4r^2-36 equation: 


Simplifying
0 = 4r2 + -36

Reorder the terms:
0 = -36 + 4r2

Solving
0 = -36 + 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.
0 + -4r2 = -36 + 4r2 + -4r2
Remove the zero:
-4r2 = -36 + 4r2 + -4r2

Combine like terms: 4r2 + -4r2 = 0
-4r2 = -36 + 0
-4r2 = -36

Divide each side by '-4'.
r2 = 9

Simplifying
r2 = 9

Take the square root of each side:
r = {-3, 3}

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