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01-07-2017
Mathematics

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Please I need help!!!!! Anyone who can help me gets 15 points :) This is the math problem and I need to expand it and it is special binomial but I don't know how to do it: (5−3r)(5−3r)=

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Аноним Аноним

01-07-2017

This is a square binomials.

In fact (5-3r)(5-3r) = (5-3r)^2

To sole it you have to do:

5^2 -2(5*-3r) + 9r^2

25 - 30r + 9r^2

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