Welcome to Westonci.ca, your one-stop destination for finding answers to all your questions. Join our expert community now! Discover precise answers to your questions from a wide range of experts on our user-friendly Q&A platform. Connect with a community of professionals ready to help you find accurate solutions to your questions quickly and efficiently.

Suppose a polynomial function of degree 4 with rational coefficients has the following given numbers as zeros:

[tex]\[ i, 4-\sqrt{5} \][/tex]

Find the other zero(s).

The other zero(s) is/are [tex]\(\square\)[/tex]
(Type an exact answer, using radicals and [tex]\( i \)[/tex] as needed. Use a comma to separate answers as needed.)


Sagot :

Given the polynomial function with rational coefficients and the zeros [tex]\(i\)[/tex] and [tex]\(4 - \sqrt{5}\)[/tex], we need to find the other zeros.

First, recall that for a polynomial with rational coefficients, complex zeros and irrational zeros must occur in conjugate pairs. This implies that if one zero is [tex]\(i\)[/tex] or [tex]\(a + b\sqrt{c}\)[/tex], then the corresponding zero must be [tex]\(-i\)[/tex] or [tex]\(a - b\sqrt{c}\)[/tex], respectively.

With this in mind, here are the given and implied zeros:
- Given zero: [tex]\(i\)[/tex]
- Its conjugate: [tex]\(-i\)[/tex]
- Given zero: [tex]\(4 - \sqrt{5}\)[/tex]
- Its conjugate: [tex]\(4 + \sqrt{5}\)[/tex]

Therefore, the complete list of zeros for the polynomial is:
[tex]$i, -i, 4-\sqrt{5}, 4+\sqrt{5}$[/tex]

The other zeros are:
[tex]$-i, 4 + \sqrt{5}$[/tex]
Thank you for choosing our platform. We're dedicated to providing the best answers for all your questions. Visit us again. We hope our answers were useful. Return anytime for more information and answers to any other questions you have. Stay curious and keep coming back to Westonci.ca for answers to all your burning questions.