Question 418064
w^2 - 25
---------
5 - w


w^2 - 25
--------- {switched bottom around} 
-w + 5


(w + 5)(w - 5)
-------------- {factored top into two binomials, factored -1 out of bottom} 
-1(w - 5)


w + 5
----- {cancelled w - 5 on top and bottom}
-1


= -w - 5 {divided each term by -1}
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