# multiple roots polynomial

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• October 27th 2010, 01:42 PM
rlkmg
multiple roots polynomial
$5x^3-x+2$
Does this polynomial have multiple roots?
How would I check if a polynomial has multiple roots or not?
• October 27th 2010, 01:49 PM
Also sprach Zarathustra
Only one root... use calculus theorems...
• October 28th 2010, 09:24 AM
TheCoffeeMachine
If $f(x) = x^3+px+q$, then the discriminant $\Delta = -4p^3-27q^2$.