SOLUTION: How do I do problems like 8r^3-64r^2+r-8?

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Question 288167: How do I do problems like 8r^3-64r^2+r-8?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
I'm assuming that you want to factor.


8r%5E3-64r%5E2%2Br-8 Start with the given expression


%288r%5E3-64r%5E2%29%2B%28r-8%29 Group like terms


8r%5E2%28r-8%29%2B1%28r-8%29 Factor out the GCF 8r%5E2 out of the first group. Factor out the GCF 1 out of the second group


%288r%5E2%2B1%29%28r-8%29 Since we have the common term r-8, we can combine like terms


So 8r%5E3-64r%5E2%2Br-8 factors to %288r%5E2%2B1%29%28r-8%29


In other words, 8r%5E3-64r%5E2%2Br-8=%288r%5E2%2B1%29%28r-8%29