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Answers by Andres F.

(ab - 9)(ab + 8) (answer)

Step 1: (ab-9)(ab+8) Step 2: ab x ab +8 x ab -9 x ab -9 x 8 Step 3:  ab2  +8ab-9ab-72= Step 4: ab2 -ab-72 solved!!! that how you would solve it everything will continue as normal