SOLUTION: Find a cubic equation whose roots are -4 and -6i.

Algebra ->  Customizable Word Problem Solvers  -> Numbers -> SOLUTION: Find a cubic equation whose roots are -4 and -6i.      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 480612: Find a cubic equation whose roots are -4 and -6i.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If -6i is a root then +6i is also
%28x+-+6i%29%2A%28x+%2B+6i%29+=+x%5E2+%2B+36
--> %28x%2B4%29%2A%28x%5E2+%2B+36%29+=+0
x%5E3+%2B+4x%5E2+%2B+36x+%2B+144+=+0