December 2019 1 23 Report
1*) Resolva as equações do 2* grau :

a) x^2 - 4x + 1 = 0

b) x^2 - 4 x + 4 = 0

c) x^2 - 2 y + 4 = 0

d) 2 x^2 + 7 x - 3 = 0
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