Q. 253.8( 37 Votes )

# Factories:

ab^{2} + (a – 1)b -1

Answer :

ab^{2} + (a – 1)b -1

= ab^{2} + ba – b – 1

= (ab^{2} + ba) – (b + 1)

= ab (b + 1) - 1(b + 1)

= (b + 1)(ab – 1)

So we get,

ab^{2} + (a – 1)b -1 = (b + 1)(ab – 1)

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