4(r^2)=8-4(r^2)

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Solution for 4(r^2)=8-4(r^2) equation: 


Simplifying
4(r2) = 8 + -4(r2)

Solving
4r2 = 8 + -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.
4r2 + 4r2 = 8 + -4r2 + 4r2

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

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

Divide each side by '8'.
r2 = 1

Simplifying
r2 = 1

Take the square root of each side:
r = {-1, 1}

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