- #1
cheahchungyin
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Homework Statement
Learning to solve cubic equations without the knowledge of any roots, and the easiest way I found out so far is still time-consuming
Homework Equations
The equation and attempt is shown in the image below, tell me if its unclear :shy:
The Attempt at a Solution
http://sphotos-a.ak.fbcdn.net/hphotos-ak-prn1/c67.0.403.403/p403x403/60637_450846098287003_1194154338_n.jpg
eventually found out x=7. Then by reducing the equation into a quadratic, I can find the other roots
So are there better ways in solving cubic? maybe some hacking fast ones? :D Appreciate the help!
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