Question

5. Find the products:
(i) (x + y) (x - y) (x² + y2)
(ii) (a + b) (a* + b) (a + b) (a - b)​

Answer 1

1) ( x+y)(x-y)(x^2+y^2)

=(x^2-y^2)(x^2+y^2)

=X^4-y^4