Here's the question you clicked on:
southrebels2
Which of the following is a polynomial with roots -3, -3i, and 3i ? A. x^3 + 3x^2 + 9x + 27 B. x^3 - 3x^2 + 9x - 27 C. x^3 + 9x^2 + 9x + 81 D. x^3 - 9x^2 + 9x - 81
Expand the following:\[(x+3)(x+3i)(x-3i).\]
Well how do you expand with the i?
Remember that \(i=\sqrt{-1}\). So, \(i\cdot i=-1\), etc.
Im totally confused..can you just tell me the answer please.