Resposta :

12x + 24xy                                C) x³ - 343      x³=343                             343|7
12x(1+2y)                                    x= √343                                              49|7
                                                    x=7                                                 7|7
B) x⁷ + x⁴                                                                                    1
 x⁴(x³ +1)

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