December 2019 1 273 Report
Lembrando que (a+1)³ = a³+3a²+3a+1, ∀ a ∈ R, e sabendo que x³ + 3x²=4-3x, com x ∈ R, pode concluir que:

a) x= -1
b)x=∛3
c) x=∛5
d) x= ∛5-1
e) x= ∛5+1

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