(i) 1 – a – b + ab
(ii) a(a – 2b – c) + 2bc
Answer :
(i) 1 – a – b + ab
Take out common in all terms,
1(1 – a) – b(1 – a)
(1 – a) (1 – b)
(ii) a(a – 2b – c) + 2bc
a(a – 2b – c) + 2bc
Above question can be written as,
a2 – 2ab – ac + 2bc
Take out common in all terms,
a(a – 2b) – c(a + 2b)
(a – 2b) (a – c)
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