Question

+
(iv) (x2 + 1 + y) (x2 + 1 - y)​

Answer 1

..........................

Answer 2

$\red{ (x^{2} + 1 + y )( x^{2} + 1 - y ) } \\= [(x^{2} + 1 )+ y ][( x^{2} + 1) - y ] \\= (x^{2} + 1)^{2} - y^{2} \\= (x^{2})^{2} + 2\times x^{2} \times 1 + 1^{2} - y^{2} \\= x^{4} + 2x^{2} + 1 - y^{2}$

Therefore.,

$\red{ Product \: of \: (x^{2} + 1 + y )( x^{2} + 1 - y ) }\\\green{ = x^{4} + 2x^{2} + 1 - y^{2} }$

•••♪