f(x) graph
f(x) = x^4 + 4x^3 - x^2 - 20x - 20
Region D

Under construction!
Interesting Polynomial Points In:
Region A may look like it contains only one zero of this function but it does not!
Region B has a zero of this function. Can you find it?
Region C contains a point where the curve flips over it's tangent line.
4th Degree Polynomial

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