Question

Pls anybody help with this question very confusing
simplify:

Answer 1

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

Substituting the result of =

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

$(2x^{8} - x {}^{4}y {}^{2}) + (y {}^{4} - 2y {}^{8})$