Question

Using suitable identities find the following products:(x+7) (x+3)

Answer 1

Answer:

(x+7)(x+3)= x²+10x+21

The identity used is (x+a)(x+b)=x²+(a+b)x+ab

Step-by-step explanation:

Answer 2

Answer:

(x+7)(x+3)

formulae: (x+a)(x+b)=x2+(a+b)x+ab

answer: x2+(7+3)x+7×3

x2+10x+21