Question

I have done all the parts but I am not knowing that in (D) AND (E) which identity should I you please tell me which identity is used in(D)AND (E) I will add you on brainless please answer me tomorrow is my exam ​

Answer 1

Answer:

IN (D) and (E) use the following identity

(x+a) (x+b) = x^2 +(a+b)x + ab