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Mathematics 18 Online
OpenStudy (anonymous):

HELP PLEASE! How can you tell on a graph when the discriminant is zero, positive or negative?

OpenStudy (imstuck):

They look like this:

OpenStudy (precal):

negative

OpenStudy (precal):

because the square root of a negative number is a complex number and that is "no solution" or 2 complex numbers

OpenStudy (precal):

or on the graph, the function would not cross the x axis

OpenStudy (precal):

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