Find a polynomial function f(x) with the given degree, zeros, and leading coefficient:

    Degree 4, x = - 3, multiplicity of 2; x = 1  multiplicity of 1; x = 3,  multiplicity of 1 and a leading coefficient of 1.

  a)  The factored form is:  

  b) Find the polynomial equation in standard form.

    f(x) =