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  • Usuário do Brainly
2014-06-29T14:01:21-03:00
X²+2(x+1)=5

x²+2x+2-5=0

x²+2x-3=0

Δ=4+12=16
√Δ=4

x'= \frac{-2+4}{2} = \frac{2}{2} =1

x"= \frac{-2-4}{2} = \frac{-6}{2} =-3

S={-3,1}
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