Factorise ab2 + (a – 1)b – 1

(i) ab2 + (a – 1)b – 1

(ii) 2a – 4b – xa + 2bx

Answer :

(i) ab2 + (a – 1)b – 1

Above question can be written as,

ab2 + ab – b – 1

Take out common in all terms,

ab(b + 1) – 1(b + 1)

(b + 1) (ab – 1)

(ii) 2a – 4b – xa + 2bx

2a – 4b – xa + 2bx

Take out common in all terms,

2(a – 2b) – x(a – 2b)

(a – 2b) (2 – x)

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