DHASHNI
factorize: x^3-2x^2-2x+6
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DHASHNI
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@shadowfiend @Outkast3r09
hartnn
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are u sure about your question,because it has one negative irrational root and 2 complex conjugate roots...
DHASHNI
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yeah i am sure
lgbasallote
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it seems it's an application of the rational roots theorem and factor theorem...
DHASHNI
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can u tell me the methodology to factorise cubic equations?
lgbasallote
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1. Find one of the factors (maybe use rational roots theorem)
2. Divide the polynomial by that factor (the quotient will be a quadratic equation)
3. Factor out that quadratic equation (maybe using quadratic formula)
that's how i do it...
DHASHNI
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i do follow that method !!!
but then that doesn't get worked out for this prob
lgbasallote
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maybe it's prime then? could be...
lgbasallote
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yeahhh...wolfram cant factor it either :(
lgbasallote
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..well it can. but it isnt pretty
hartnn
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even wolfram giving -1.5986 and 1.8+/-0.718 i ??
DHASHNI
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yeah bt then i want that solved step by step...i wanted to knw how did they start
lgbasallote
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one thing's for sure...it wasnt algebra
DHASHNI
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hmm
DHASHNI
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wat abt this prob : : x^3-2x^2-2x+6
DHASHNI
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these are actually a part of a big ques... so it ought to be solved to solve the big prob!
hartnn
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its the same problem...
sadrian
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i only see it like x((x-2)x-2)+6