Question

14. (x - y) (x + y) (x² + y²)(x^4 + y^4) is equal to
(a) x^16 - y^16 (b) x^8 - y^8 (c) x^8 + y^8
(d) x^16 + y ^16​

Answer 1

Answer:

(x-y)(x+y)(x^2+y^2)(x^4+y^4)

=(x^2-y^2)(x^2+y^2)(x^4+y^4)

=(x^4-y^4)(x^4+y^4)

=x^8-y^8

so (b) is the right answer

Answer 2

Answer:

answer D

1. x^16+ y^16
2. (x^4+x^4)(x^4-y4)