SOLUTION: X^4+3X^3+9X^2+6X-12=0 find the roots of this equation.

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Question 732061: X^4+3X^3+9X^2+6X-12=0
find the roots of this equation.
Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!
It has no rational zeros, so synthetic division will not help.

However its roots can be approximated using a graphing calculator:

x = -1.830479823, and x = 0.781843107 

Edwin