Question

${x}^{4} - {y}^{4} = {?}$

Answer 1

hey mate
here's ur answer

${x}^{4} - {y}^{4} = {( {x}^{2} )}^{2} - {( {y}^{2} )}^{2} \\ = ( {x}^{2} + {y}^{2} )( {x}^{2} - {y}^{2} ) \\ = ( {x}^{2} + {y}^{2} )(x + y)(x - y)$
hope this helps u