Question

9. Verify: (i) x + y = (x + y) (x2 - xy + y^2)
(ii) x^3 - y^3 = (x - y) (x^2 + xy + y^2)​

Answer 1

Step-by-step explanation:

(i)(x+y)( x^2- xy+ y^2)

=x3-x2y+xy2+x2y-xy2+y3

=x3 + y3

(ii)(x-y)(x2+xy+y2)

=x3+x2y+xy2-x2y-xy2+y3

=x3-y3