Question

Using identity solve
(a) (x+7) (x-7)
(b) (x+5 ) (x+5)
PLEASE ANSWER THIS IT'S URGENT...​

Answer 1

Step-by-step explanation:

a. (x+7)(x-7)=x²-7²=x²-49

using (a+b)(a-b)=a²-b²

b. (x+5)(x+5)=x²+5²+2(x)(5)=x²+25+10x

using (a+b)²= a²+b²+2ab