Explicación paso a paso:
[tex](x + y) \times (x + y) = {x}^{2} + {y }^{2} \\ \\ (x + y) ^{2} \times (x + y) = ( {x}^{2} + {y}^{2} ) \times (x + y) = {x}^{3} + {y}^{3} [/tex]
