Respostas

2014-05-08T14:38:34-03:00
2014-05-08T14:52:32-03:00
(x+3)²=1
x²+6x+9=1
x²+6x+9-1=0
x²+6x+8=0
Δ=b²-4ac
Δ=6²-4x1x8
Δ=36-32
Δ=4
x=-b+-√Δ/2a
x'=-6+√4/2x1
x'=-6+2/2
x'=-4/2
x'=-2
x"=-6-2/2
x"=-8/2
x"=-4
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