izzyisabelle123 izzyisabelle123

15-04-2017
Mathematics

contestada

If -3+i is a root of the polynomial function f(x), which of the following must be a root of f(x)?

a. -3-i
b. -3i
c. 3-i
d. 3i

Respuesta :

Аноним Аноним

15-04-2017

use the conjugate of the 1st solution to find the second. which is -3 - i. or a

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Luv2Teach Luv2Teach

15-04-2017

When dealing with imaginary numbers as roots of a polynomial, you will see that they always occur in conjugates. So the other root that goes with this one is -3 - i. This will always be the case.

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