Respuesta :

hspring793

Answer:

Step 1: (ab-9)(ab+8)

Step 1: (ab-9)(ab+8)Step 2: ab x ab +8 x ab -9 x ab -9 x 8

Step 1: (ab-9)(ab+8)Step 2: ab x ab +8 x ab -9 x ab -9 x 8Step 3: ab2 +8ab-9ab-72=

Step 1: (ab-9)(ab+8)Step 2: ab x ab +8 x ab -9 x ab -9 x 8Step 3: ab2 +8ab-9ab-72=Step 4: ab2 -ab-72

fieryanswererft

Answer:

a²b²-ab-72

Step-by-step explanation:

(ab - 9)(ab + 8)

= a²b²-ab-72