已知AB不等於0,且A B互為相反數,求AB+B/A + AB+A/B的值

已知AB不等於0,且A B互為相反數,求AB+B/A + AB+A/B的值

A B互為相反數
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