Respuesta :

We use quadratic formula then

For a expression

  • ax²+bx+c=0

The quadratic formula is

[tex]\\ \rm\Rrightarrow x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]

If underroot values becomes negative we use iota(i)

which has value=√-1

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