SOLUTION: how can i solve this (r-2)^2-(r+2)^2

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Question 322193: how can i solve this
(r-2)^2-(r+2)^2
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
how can i solve this
(r-2)^2-(r+2)^2
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You can't solve it, it's not an equation.
It might be simplified some.
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(r-2)^2-(r+2)^2
One way is to expand everything:
%28r%5E2+-+4r+%2B+4%29+-+%28r%5E2+%2B+4r+%2B+4%29
= -8r
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Another way is to factor it as a difference of 2 squares:
= [(r-2) + (r+2)]
= 2r * -4
= -8r