Question

Find the product of :-
(a+b)(a-b)(a2+b2
)​

Answer 1

Actually,it's a property!

Similar properties are given in attachment,have a look on them.

$\huge\mathbb{\purple{ドラえもんバツ のび太}}$

Answer 2

= (a+b) (a-b) (a²+b²)

= a²(a+b) + b²(a+b) + a²(a-b) + b²(a-b)

= a³ + ab + b²a + b³ + a³ - ab + b²a - b³

= a³ + a³ + ab - ab + b²a + b²a + b³ - b³

= 2a³ + 2b²a