Respostas

2013-11-04T14:59:41-02:00
M² + 4m - 21 = 0
\frac{- 4 +  \sqrt{100}}{2}
\frac{- 4 + 10 }{2}
 \frac{6}{2}
m = 3

 \frac{-4 -  \sqrt{100} }{2}
 \frac{- 4 - 10}{2}
m = -7

△ = 4² - 4(1)(-21)
△ = 16 + 84
△ = 100

S = 3 - 7
S = - 4
P = 3 . (-7)
P = - 21
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