factorise : a^2+b-ab-a
Answers
Answered by
17
a^2-a-ab-b
=a (a-1)-b (a-1)
=(a-1)(a-b)
Answered by
19
Answer:(a-1)(a-b)
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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