SOLUTION: Please help solve: (r-2)^3

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Question 626772: Please help solve: (r-2)^3
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
%28r-2%29%5E3

%28r-2%29%28r-2%29%28r-2%29

%28r-2%29%28r%5E2-4r%2B4%29

r%28r%5E2-4r%2B4%29-2%28r%5E2-4r%2B4%29

r%5E3-4r%5E2%2B4r-2r%5E2%2B8r-8

r%5E3-6r%5E2%2B12r-8

So %28r-2%29%5E3 expands out to r%5E3-6r%5E2%2B12r-8

In other words, %28r-2%29%5E3=r%5E3-6r%5E2%2B12r-8 for all values of 'r'

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