The factorisation of ab - a - b + 1 is

(a+1)(b+1)

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(a+1)(b-1)

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(a-1)(b-1)

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(a-1)(b+1)

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Solution

The correct option is C (a-1)(b-1)

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Similar questions

a b^{2} + b (a - 1) - 1

a^{2} b^{2} + 8 a b - 9

a b^{2} + (a - 1) b - 1

Factorise:
$a^{2} + a b (b + 1) + b^{3}$

Factorise $(a - 1) - (a - 1)^{2} + a b - b$ .

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