Respostas

2013-09-21T20:27:34-03:00
X+5x²=2
x+5x²-2=0

Delta = 1² - 4.5.(-2) = 1+40 = 41
x= -1 +/- raiz de 41 / 2.5
x = -1 +/- 6,4 / 10
x = 5,4/10 e -7,4/10 ou 0,54 e - 0,74
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