Question:
Mark (✓) against the correct answer:
ab − a − b + 1 = ?
(a) (1 − a)(1 − b)
(b) (1 − a)(b − 1)
(c) (a − 1)(b − 1)
(d) (a − 1)(1 − b)
Solution:
(c) (a − 1)(b − 1)
$a b-a-b+1$
$=a(b-1)-1(b-1)$
$=(a-1)(b-1)$
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.