Question

a (a + c)- b (b + c) factorise by using identity​

Answer 1

Answer:(a-b)(a+b+c)

Step-by-step explanation:

a(a+c)-b(b+c)

a^2+ac-b^2-bc

=(a^2-b^2)+(ac-bc)

{(a^2-b^2)=(a+b)(a-b)

(a+b)(a-b)+c(a-b)

(a-b)(a+b+c)

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