Question

Factorise.
$x^4-(y+z{)}^4$

Answer 1

$\begin{array}{c}{x}^4-{\left(y+z\right)}^4\\ {\left(x^2\right)}^2-{\left({\left(y+z\right)}^1\right)}^2\\ \left(x^2-{\left(y+z\right)}^2\right)\left(x^2+{\left(y+x\right)}^2\right)\end{array}$