Question

Multiply the following polynomial:
(ab - 9)(ab + 8)

Answer 1

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

Answer 2

a²b²-ab-72

Explanation:

(ab - 9)(ab + 8)

= a²b²-ab-72