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critical  Oct 6, 2018
 #1
avatar+89874 
+2

x^2 +3x - 28  factors as  ( x +7) ( x - 4)

 

x^2  - 7x  - 12  factors as  ( x - 3) ( x - 4)

 

So....the (x - 4)  factors will "cancel" in the numerator /denomnator  and we  are left with

 

[ x + 7 ]

_______

 [ x - 3 ]

 

 

cool cool cool

CPhill  Oct 6, 2018

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