Respostas

2014-05-05T15:06:18-03:00
X²+3x-10=0
Δ=3²-4*1*(-10)
Δ=49
x= \frac{-3+/-7}{2} ---- x'= \frac{-3+7}{2}=2  x"= \frac{-3-7}{2}=-5
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2014-05-05T15:15:41-03:00
A=1 b=3 c=-10
Δ=3²-4.1.(-10)
Δ=9+40
Δ=49

-3+ -√49÷2.1
-3+ -7÷2
x'= -3+7÷2 =4÷2=2
x''= -3-7÷2 = -10÷2 =5

V= \left \{ {{2} \atop {5}} \right.
1 5 1