Respostas

2013-12-16T16:16:33-02:00
7x^4 - 14x^3
7x^3(x - 2)
d)
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c)fica (x-3)²  = (x² - 6x + 9)

2013-12-16T16:19:18-02:00
D) 7x^4 - 14x^3
c) (x-3)²=(x²-6x+9)