-9r^2+4r^2=

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Solution for -9r^2+4r^2= equation: 


Simplifying
-9r2 + 4r2 = 0

Combine like terms: -9r2 + 4r2 = -5r2
-5r2 = 0

Solving
-5r2 = 0

Solving for variable 'r'.

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

Divide each side by '-5'.
r2 = 0

Simplifying
r2 = 0

Take the square root of each side:
r = {0}

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