r^2-16=

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Solution for r^2-16= equation: 


Simplifying
r2 + -16 = 0

Reorder the terms:
-16 + r2 = 0

Solving
-16 + r2 = 0

Solving for variable 'r'.

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

Add '16' to each side of the equation.
-16 + 16 + r2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + r2 = 0 + 16
r2 = 0 + 16

Combine like terms: 0 + 16 = 16
r2 = 16

Simplifying
r2 = 16

Take the square root of each side:
r = {-4, 4}

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