Question

factorise 4 x square + 2 y square + x square y square + 8 ​

Answer 1

4x²+2y²+x²y²+8

=4x²+x²y²+2y²+8

=x²(y²+4)+2(y²+4) {taking common (y²+4)}

=(y²+4)(x²+2)