Persona: Same as a social role.
Can also be used about a character an actor plays. The word comes from the Greek 'per-sona,' literally 'sound through,' and referring to the masks worn by actors.
In archetypal psychology, the Persona is the mask or appearance one presents to the world. It may appear in dreams under various guises.
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... then there are two different solutions x, both of which are real. (Geometrically, this means that the parabola intersects the x-axis in two points.)
If the discriminant ...