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pkmnmushy
Let's put it this way:  If you plot a few non-x-intercept points and then draw a curvy line through them,you will not know if you got the x-intercepts even close to being correct. The only way you can be sure of your x-intercepts is to set the quadratic equal to zero and solve. So its a matter of guessing from the pictures. Basicaly said, the calculator won't give you the exact result.
kenchellbegay

Some polynomial equations have complex solutions.


Therefore, complex solutions cannot be found by graphing the related system or function in the Cartesian (x-y) plane.


Polynomial functions with all complex solutions do not have x-intercepts, and the related system of equations will not intersect.

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