February 20, 2017

Homework Help: Pre-Calculus/Trig Check please and help

Posted by Tabitha on Monday, September 5, 2011 at 8:52am.

Could someone please check the first one and help me with the second one. I'm stuck-Thank you

1.What are theroots of the following polynomial equation?
(x+2i)(x-5)(x-2i)(x+8) = 0
I think the roots are -2i,5,2i,-8-you take out the roots as opposites of what are in the equaion correct?
2. Write a polynomial of the smallest degree with roots 3,3i and -3i
Final answer can't have parentheses
(x-3)(x-3i)(x+3i)=0 and then I'm stuck I don't know what to do when you multiply the x times the -3i

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