2r^2-8=0

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Solution for 2r^2-8=0 equation:


Simplifying
2r2 + -8 = 0

Reorder the terms:
-8 + 2r2 = 0

Solving
-8 + 2r2 = 0

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 + 2r2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 2r2 = 0 + 8
2r2 = 0 + 8

Combine like terms: 0 + 8 = 8
2r2 = 8

Divide each side by '2'.
r2 = 4

Simplifying
r2 = 4

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

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