Question

please answer its urgent

Answer 1

I hope this helps you.

Answer 2

Hello,
x⁴+y⁴+x²y²;
add and subtract x²y²:

=x⁴+y⁴+x²y²+x²y²-x²y²;
=x⁴+2x²y²+y⁴-x²y²;

remembering that a²+2ab+b²=(a-b),you get it:
=(x²+y²)²-(xy)²;

remembering that a²-b²=(a+b)(a-b),you get it:
=[(x²+y²)+xy][(x²+y²)-xy];

=(x²+xy+y²)(x²-xy+y²)

bye :-)