SOLUTION: What is the coefficient of xy in the expansion of (x-y)2?

Question 847107: What is the coefficient of xy in the expansion of (x-y)2?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

What is the coefficient of xy in the expansion of (x-y)2?  -2

 (x-y(x-y) = x^2 -2xy + y^2

F	First terms

O	Outside terms  -xy

I	Inside terms   -xy  

                                    -2xy

L	Last terms



 

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