-8+3r^2=4

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Solution for -8+3r^2=4 equation: 


Simplifying
-8 + 3r2 = 4

Solving
-8 + 3r2 = 4

Solving for variable 'r'.

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

Add '8' to each side of the equation.
-8 + 8 + 3r2 = 4 + 8

Combine like terms: -8 + 8 = 0
0 + 3r2 = 4 + 8
3r2 = 4 + 8

Combine like terms: 4 + 8 = 12
3r2 = 12

Divide each side by '3'.
r2 = 4

Simplifying
r2 = 4

Take the square root of each side:
r = {-2, 2}

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