How to Determine the Number of Real and Nonreal Solutions for a Quadratic Equation

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For the following exercises, determine the number of real and nonreal solutions for each quadratic function shown.

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My textbook mentions that there are 2 real and 0 nonreal solutions for the graph on the left side. It is an identical graph to the one in your video. Not exactly sure what that means by 0 nonreal solutions and why you mentioned that "the rest are all nonreal solutions"

gz
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will the be a video on quadratic functions in standard form and how give the vertex?
please?

Mark_Israel