Polynomial and rational functions

Question

Find a polynomial f(x) of degree 4 that has the following zeros.

9, -3 (multiplicity 2), 0

leave answer in factored form

Answer 1

(x-9)(x+3)²x = 0

or

(x-9)(x+3)(x+3)(x) = 0

just change the sign of each zero and add it to x

9 becomes -9, then stick an x in front of it to get the factor x-9