Question

The factorisation of ab- a-b+1 is​

Answer 1

Answer:

ab – a – b + 1 = (1-a) (b-1)

Step-by-step explanation:

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)