Question

Verify: (i) x2 + y2 = (x + y) (x2 - xy + y2)​

Answer 1

x²+y²= (x+y)(x²-xy+y²)

Taking rhs side

=x(x²-xy+y²)+y(x²-xy+y²)

=x³-x²y+xy²+x²y-xy²+y³

= x³+y³

which is isn't equal to lhs

hope it helped