how do you do K^7 - 2k^6m - 15k^5m^2

I am stuck on this and I have no clue how to do it at all.
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1 Answer

k5 is common to all the terms:

k5(k2-2km-15m2)=k5(k-5m)(k+3m)

by Top Rated User (1.1m points)

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