Question

Factorise
please do this sum​

Answer 1

Answer:

$\bf \: {x}^{4} + 5 {x}^{2} + 9 \\ \\ \sf \: {x}^{4} + 6 {x}^{2} + 9 - {x}^{2} \\ \\ \sf \: ( {x}^{2} )^{2} + 2. {x}^{2} .3 + ( {3})^{2} - {x}^{2} \\ \\ \sf( {x}^{2} + 3)^{2} - ({x})^{2} \\ \\ \bf ({x}^{2} + 3 + x)( {x}^{2} + 3 - x)$