Resposta :

ArthurPDC
[tex]\Delta=b^2-4\cdot a \cdot c\\\Delta=(-3)^2-4\cdot1\cdot2\\\Delta=9-8\\\boxed{\Delta=1}[/tex]


[tex]x=\dfrac{-b\pm\sqrt{\Delta}}{2a}=\dfrac{3\pm\sqrt1}{2}=\dfrac{3\pm1}{2}\Longrightarrow\begin{cases}x_1=2\\x_2=1\end{cases}[/tex]

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