SOLUTION: factor completely 30r^3-40r^2+270r-360

Question 645982: factor completely
30r^3-40r^2+270r-360
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given expression

Group the terms in two pairs

Factor out the GCF out of the first group. Factor out the GCF out of the second group

Since we have the common term , we can combine like terms

Now factor out 10 from

So factors to

In other words, for all values of r.

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