Urgent i need quick math rn : ) find the polynomial function with the following roots -1 of multiplicity 2 and 3

Multiplicity 2 means you're using that same root twice.  So we will FOIL out (x+1)(x+1)(x-3).  Doing that multiplying gives us  .  Combining like terms gives us the third degree polynomial we are looking for: 

(-0, -7) is your answer