Respostas

2013-10-31T20:54:03-02:00
2x-4x²+10

Δ=b²-4.a.c
Δ=16-80
Δ= -64
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2013-10-31T21:39:32-02:00
Δ= b² -4.a.c
Δ= (-4)² - 4.2.10
Δ=16-80
Δ=64

X= -b±[tex] √∆[/tex/ 2.a
X=4±8/4

x'= 4-8/4 = -1
x''= 4+8/4 = 3

S { -1, 3 }
1 5 1