Question

Express 9ab - ab in simplest form. A. 8
B. 9
C. 8ab
D. 9ab

Answer 1

8ab

Explanation:

think of it as 9-1

9ab-1ab=8ab

can't be 8 because the ab would be gone

can't be 9 because it is 9ab not just 9

can't be 9ab because that's the same