Respostas

2013-11-28T14:19:07-02:00
X²+x-3=(a-b)x²+x-(a+b)
a=1,b=1 e c=-3
x²+x-3=(1-1)x²+x-(1+1)
x²+x-3=0x²+x-2
x²+x-3=x-2
x²+x-3-x+2=0
x²-1=0
a=1,b=0 e c==1
^=b²-4ac
^=0²-4.1.(-1)
^=0+4
^=4
x=-b+-V^/2a
x=-0+-V4/2.1
x=+-2/2
x¹=2/2=1
x²=-2/2=-1
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