Re: Distance between a point and y = ax^2 + bx + c

Since at least one root has to be real, can I
conclude
than if Q < 0 or AC + B < 0, then D must be equal to
conj(E1) or conj(E2) since that will cancel out the
complex factors in x2 and x3?
To clarify. If Q < 0 or AC + B < 0 then x1 is imaginary
and either x2 or x3 must be real...
.

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