Question

Which of the following is a polynomial with roots 3, -3i, and 3i?

Answer 1

If these are roots 3, -3i, and 3i, then (x-3) and ( x - (-3i)) and (x -3i) are factors.

Multiply these together and let's see what you get:

(x-3)*(x +3i)*(x-3i) = ?

Answer 2

okay hold on

Answer 3

Okay.

Answer 4

x^3-3x^2+9x-27

Answer 5

>>x^3-3x^2+9x-27

I got x^3 - 3x^2 - 9x - 27. I will check my work.

Answer 6

okay

Answer 7

Sign error on my part: x^3 - 3x^2 + 9x - 27. The same as yours.

Do you have an option that looks like that?

Answer 8

yes thank you!

Answer 9

Glad to help.