[tex]2z^2+z+10=0\\\Delta=1^2-4\cdot2\cdot10=1-80=-79\\\sqrt{\Delta}=\sqrt{-79}=\sqrt{79}i[/tex]
[tex]z_1=\dfrac{-1-\sqrt{79}i}{2}=-\dfrac{1}{2}-\dfrac{\sqrt{79}i}{2}\\\\z_2=\dfrac{-1+\sqrt{79}i}{2}=-\dfrac{1}{2}+\dfrac{\sqrt{79}i}{2}[/tex]
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[tex]2z^2+z+10=0\\\Delta=1^2-4\cdot2\cdot10=1-80=-79\\\sqrt{\Delta}=\sqrt{-79}=\sqrt{79}i[/tex]
[tex]z_1=\dfrac{-1-\sqrt{79}i}{2}=-\dfrac{1}{2}-\dfrac{\sqrt{79}i}{2}\\\\z_2=\dfrac{-1+\sqrt{79}i}{2}=-\dfrac{1}{2}+\dfrac{\sqrt{79}i}{2}[/tex]