Question

factorization of. x⁴+y⁴

Answer 1

${ {x }^{2} }^{2} + { {y}^{2} }^{2}$
$( {x}^{2} + {y}^{2} ) {}^{2}$
${x}^{4} + {y}^{4} + 2( {x}^{2} + {y}^{2} )$