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Re: Need help factoring a 3rd Degree polynomial
Use the factor theorem: for a polynominal f, if f(a) = 0 --> (x-a) is a factor
In this case, f: x^3 - 10x + 3
f(3) = 3^3 - 10(3) + 3 = 27 - 30 + 3 = 0
Therefore, (x-3) is a factor of f.
Using synthetic division (I'll leave this step to you), you can see that f = (x-3)(x^2 + 3x - 1)
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05-09-2006, 22:59
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