The polynomial of degree 4, ` P(x)` has a root of multiplicity 2 at ` x=3 ` and roots of multiplicity 1 at `x=0` and `x=-4`. The graph passes through the point `(-6,3888)`.

Find a formula for ` P(x) `.

 `P(x) =`  

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Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question