Select the correct algebraic expression.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. ab – a – b + 1 = (a – 1) (b – 1)
Calculations:
Taking option (1), we get
⇒ ab – a – b + 1 = (a – 1) (b – 1)
Taking RHS
⇒ (a - 1)(b - 1)
⇒ ab - a - b + 1
Hence, LHS = RHS