What are the steps to solve this quartic equation?

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SUMMARY

The discussion focuses on solving a quartic equation, specifically one that appears to be challenging due to the difficulty in finding rational roots. Participants suggest using the quartic formula as a last resort and recommend approximating roots or checking for potential typos in the problem statement. A participant successfully calculated roots using a calculator, yielding x=3±√6, and pointed to resources like Wikipedia for further understanding of quartic equations. Additionally, Mathematica is mentioned as a tool for obtaining all four roots efficiently.

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  • Familiarity with the quartic formula for solving polynomial equations
  • Basic knowledge of numerical methods for root approximation
  • Experience with mathematical software like Mathematica
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  • Study the quartic formula in detail to understand its application
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Students, educators, and mathematicians who are tackling quartic equations, as well as anyone interested in polynomial root-finding techniques and mathematical software applications.

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Homework Statement



Solve the equation http://img593.imageshack.us/img593/2523/msp662119eai22g9fe584bh.gif


Homework Equations





The Attempt at a Solution



I tried to find the factor of the equation by substituting the factor of 9, that is +-1,+-3 and +-9 into the equation but none of them equal 0. I had no ideas how to solve it unless i get one of the roots of the equation... Can anyone give me any hints or tips? Thanks.
 

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I'm afraid you're out of luck then. If this question was from school, maybe they were expecting you to approximate the roots, or there was a typo made somewhere, or they gave you a quadratic factor. If not the only other way is to use the quartic formula, and that's not something you want to do or what they would be expecting of you.

Using a calculator, I got roots x=3\pm \sqrt{6}. This information should be sufficient for you to find all the roots and factorize it into its real quadratic factors or complex linear factors.
 
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You can have a look at this page,http://en.wikipedia.org/wiki/Quartic_equation"
Or using Mathematica,you can get four roots.
 
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