Question

factorise a^2+b-ab-a​

Answer 1

Step-by-step explanation:

a²+b-ab-a

=a²-ab+b-a

=a(a-b)+b-a

=a(a-b)+(-b×-1)(a×-1)

=a(a-b)+ -1(a-b)

=(a-1)(a-b)

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