Respuesta :

VectorFundament120

[tex]D=b^2-4ac\\D=(-2)^2-4(8)(-1)\\D=4+32\\D=36[/tex]

For another information, when D > 0, there are 2 real roots.

When D = 0, there is only one real root.

And when D < 0, there are no real roots (also known as imaginary.)

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