Question

Dear sir/Ma'am
I have a problem in solving this question
Q. Find the product using suitable identity .
(a^2+b^2)(- a^+b^2)

Answer 1

(a+b)(a-b)=a^2-b^2............(identity)

i took a=a^2 and b=b^2
then
(a^2+b^2)(a^2-b^2)=a^4-b^4

the above given problem is (b^2+a^2)(b^2-a^2)=b^4-a^4