Question

factorise (x-y)^4-(z)^4​

Answer 1

Step-by-step explanation:

let x-y be a

then

$a {}^{4} - z {}^{4 } = (a {}^{2} - z {}^{2} )(a {}^{2} + z {}^{2} ) \\ \\ \\ = (x - y - z)(x - y + z)( {(x + y)}^{2} + z {}^{2} )$