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# cubic polynomials watch

1. help me please. how to factorise this cubic polynomail

f(x)=x^3 + 4x^2 -x + 6
2. (Original post by reetkang)
help me please. how to factorise this cubic polynomail

f(x)=[COLOR=&quot;Red&quot;]x^3[/COLOR] + [COLOR=&quot;Orange&quot;] 4x^2[/COLOR] [COLOR=&quot;Plum&quot;]-11x[/COLOR] [COLOR=&quot;Blue&quot;]+ 6[/COLOR]
its 11x guys ,,sorry
3. Unless you can solve it quickly by inspection, you'll have to use other methods.

Closed-form solutions exist for cubic polynomials. The formulae can be tedious, but they are do-able. For a nice introduction to the topic, read over the relevant pages on Wikipedia and MathWorld.

On the other hand, if you just want numerical results, there are many software products that can do this. In fact, there are several programs posted online that can do this--for free:

Cubic Equation Solver

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