$Q^{}$ =$3x^{4}$+$5x^{2}$.$y^{2}$ +$2y^{4}$ +$2y^{2}$ +4
$Q^{}$ =$3x^{4}$+$2x^{2}$ .$y^{2}$ +$3x^{2}$ .$y^{2}$ +$2y^{4}$ +$2y^{2}$ +4
$Q^{}$ =$x^{2}$ .($3x^{2}$ +2.$y^{2}$ )+$y^{2}$ .($3x^{2}$ +2$y^{2}$ )+$2y^{2}$ +4
$Q^{}$ =($3x^{2}$ +2$y^{2}$ ).($x^{2}$+$y^{2}$)+$2y^{2}$ +4
$Q^{}$ =($3x^{2}$ +2$y^{2}$ ).2+$2y^{2}$ +4
$Q^{}$ =$6x^{2}$+4$y^{2}$ +$2y^{2}$ +4
$Q^{}$ =$6x^{2}$+6$y^{2}$ +4
$Q^{}$ =6.($x^{2}$+$y^{2}$)+4
$Q^{}$ =6.2+4
$Q^{}$ =16
