186k views
0 votes
Please really need help on this

Please really need help on this-example-1

1 Answer

4 votes

Q1: If k is a root of a polynomial, then the polynomial is a multiple of (x-k).

So, given the roots 0. -2 and 7, the polynomial must be at least


(x-0)(x-(-2))(x-7)=x(x+2)(x-7)

Q2: If a polynomial with real coefficient has a complex root z, then its conjugate z' must be a solution as well.

So, if 5-i is a root, its conjugate 5+i must be a root as well.

User Zapatilla
by
8.7k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories