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Mathematics 20 Online
OpenStudy (anonymous):

The equation of which graph has a positive discriminant?

myininaya (myininaya):

the one where it touches the x axis twice

jimthompson5910 (jim_thompson5910):

If the parabola crosses the x-axis in two different places, then the discriminant is positive.

OpenStudy (anonymous):

\[x^2 - 1\]

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