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0 votes
31.2k views
in Factorization by (58.8k points)

ab – a – b + 1 = ?

(i) (a-1) (b-1)

(ii) (1-a) (1-b)

(iii) (a-1) (1-b)

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

1 Answer

+1 vote
by (44.3k points)
selected by
 
Best answer

(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)

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