How do you write a cubic polynomial function with zeros at ­2, 1, and 3?

Answer 1

For cubic polynomial functions, the general form is (x-a)(x-b)(x-c) where a,b, and c are the x-values where y is zero. Thus, for zeroes of 1,2 and 3, the equation is f(x) = (x-1)(x-2)(x-3).

Answer 2

For the zeros, you have determine the factors that give you those zeros. Since they are all positive, they would all be subtraction.

f(x)=(x-2)(x-1)(x-3)

Multiply these together and you will have the polynomial.