Question

Which of the following is true? *
1 point
ab - a - b + 1 = (1-a) (1-b)
ab - a - b + 1 = (a-1) (b-1)
ab - a - b + 1 = (1-a) (b-1)
ab - a - b + 1 = (a-1) (1-b)​

Answer 1

Answer:

(a-1)(b--1)

Step-by-step explanation:

hope you understand