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Comparing Coefficients

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(edited 12 years ago)
Original post by PerigeeApogee
Hello.

So, I have this cubic:

λ3+1.212λ2+1.8522λ+1.652 \lambda^3+1.212\lambda^2+1.8522\lambda+1.652

Which I know can be factorised into:

(λ+0.98)(λ2+Aλ+B) (\lambda+0.98)(\lambda^2+A \lambda+B)



If you plot that, you'll find that -0.98 is not a root; what makes you think it is?

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