Respostas

2013-12-10T17:14:37-02:00
X² - 3x + 2 = 0

x' = 2
x" = 1
1 5 1
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2013-12-10T17:18:57-02:00
X² - 3x + 2 = 0


∆=b²-4.a.c
∆=-3²-4.1.2
∆=9-8
∆=1

x=-b+/-√∆/2.a
x=-(-3)+/-√1/2.1
x=3+/-1/2

x1=3+1/2
x1=2

x2=3-1/2
x2=1
1 5 1