Report - Colectânea de Exercícios, Testes e Exames de …repositorio.ual.pt/bitstream/11144/469/1/Colectanea-ex... · 2018-02-07 · ... 3x 9y + 27z = 3(x 3y + 9z) (d) 7x2 49xy = 7x(x 7y)

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