Question

suma o diferencia de cubos xy6-216y9

Answer 1

$(xy)^{6} -216 y^{9} = [(xy)^{2} ]^{3} - (6y^{3} )^{3}$

$[( xy)^{2} -6y^{3} ][(xy)^{4} +(xy)(6y^{3} ) +(6y^{3})^{2} ]$