Respuesta:
[tex](4 {x}^{5} {y}^{7} ) \times ( - 9 {x}^{2} y) \\ 4 {x}^{5} {y}^{7} \times (- 9 {x}^{2} y) \\ - 5 {x}^{5 + 2} {y}^{7 + 1} \\ = - 5 {x}^{7} {y}^{8} [/tex]
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Respuesta:
[tex](4 {x}^{5} {y}^{7} ) \times ( - 9 {x}^{2} y) \\ 4 {x}^{5} {y}^{7} \times (- 9 {x}^{2} y) \\ - 5 {x}^{5 + 2} {y}^{7 + 1} \\ = - 5 {x}^{7} {y}^{8} [/tex]