Given that AB is not equal to 0, and a and B are opposite to each other, find the value of AB + B / A + AB + A / b
A and B are opposite numbers
A+B=0
=>B=-A
AB+B/A + AB+A/B
=(AB-A)/A+(AB-B)/B
=B-1+A-1
=(A+B)-2
=-2
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