8r^2+4=36

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Solution for 8r^2+4=36 equation: 


Simplifying
8r2 + 4 = 36

Reorder the terms:
4 + 8r2 = 36

Solving
4 + 8r2 = 36

Solving for variable 'r'.

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

Add '-4' to each side of the equation.
4 + -4 + 8r2 = 36 + -4

Combine like terms: 4 + -4 = 0
0 + 8r2 = 36 + -4
8r2 = 36 + -4

Combine like terms: 36 + -4 = 32
8r2 = 32

Divide each side by '8'.
r2 = 4

Simplifying
r2 = 4

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

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