Question

8. ab - a - b +1 = ?
(a) (a-1)(b-1)
(b) (1 - a)(1 - b)
(c) (a - 1)(1 - b)
(d) (1 - a)(b-1) ​

Answer 1

ab-a-b+1=a(b-1)-1(b-1)

=(a-1)(b-1)

It may be useful!

Answer 2

Step-by-step explanation:

(iv) (1-a) (b-1)

By taking a and -1 as the common factor we get,

ab –a –b +1

= a(b-1) -1(b-1)

= (b-1) (a-1)

I hope this answer is helpful for you