Find s cubic function with the given zeros -7 5 -3

If the zeros are -7, 5, and -3, then the factors are (x+7), (x-5), (x+3).  We have to multiply all those together to get a third degree polynomial.  Multiplying out the first 2, we get .  Now we'll multiply in that last factor:  .  There's your third degree polynomial!!

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