SOLUTION: Find the remaining of a polynomial with real number coefficients whose degree is 3 and has zeros -3 and 2+i.

Question 859104: Find the remaining of a polynomial with real number coefficients whose degree is 3 and has zeros -3 and 2+i.
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
Instead of "remaining polynomial", you mean, "remaining zero". One of the zeros given is 2+i, so another necessary zero is 2-i.

The function from which you can form the polynomial for it is based on the factored form, . You can perform the multiplication in order to have the product as polynomial.

Part of that will include

-
... and you would then finish by performing the multiplication .
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