SOLUTION: Can u help me express the rational expression (y-1)(y-3)/(3-y)(1+y)

Question 819190: Can u help me express the rational expression (y-1)(y-3)/(3-y)(1+y)
Answer by jsmallt9(3758) (Show Source): You can put this solution on YOUR website!

The "trick" with this one is recognizing that y-3 and 3-y are not the same... but they are opposites of each other! So if we factor out a -1 from one of them (not both!), we will have some factors to cancel:

leaving...

All that's left is to multiply out the numerator:

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