A polynomial function has -5√3i as a root. Which of the following must also be a root of the function?

-5-√3i
-5+√3i
5-√3i
5+√3i

Respuesta :

Answer:

-5+√3i  is the given root so -5-√3i  must be the other root

Step-by-step explanation:

We know that complex roots must come in pairs. The pairs are complex conjugates.  (a+bi)  and (a-bi)

You are missing a sign between -5 and the square root

So if - 5+ sqrt(3) i  is a root, then -5 - sqrt(3) i   must be a root  

if -5 - sqrt(3)i   is a root, then -5 + sqrt(3)i   must be a root.


I will assume you missed a + sign

-5+√3i  is the given root so -5-√3i  must be the other root

Answer: is A

Step-by-step explanation:

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