Respostas

2013-11-07T11:07:26-02:00
X² - Sx + P = 0
x² - (2-3)x + (2.(-3)) = 0
x² - (-x) + (-6) = 0
x²+x-6 = 0 (D)
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2013-11-07T11:15:03-02:00
Letra (D)
+ x - 6 = 0

delta= 1+24 = 25

(-1+5)/2=4/2= 2

(-1-5)/2= -6/2= -3
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