List the possible rational roots for the function whose equation is f(x)= 2x^3+bx^2-cx+10, where b and c are integers. for the answer i got -2 am i right?

Question

List the possible rational roots for the function whose equation is  f(x)= 2x^3+bx^2-cx+10, where b and c are integers. for the answer i got -2 am i right?

anonymous · Answer

That is false.  The roots will depend on the values of $b$ and $c$.

anonymous · Answer

so how do i do it?

anonymous · Answer

Well, there is an analog of the quadratic formula for cubics, though if this his homework I highly doubt that this is instructive. http://en.wikipedia.org/wiki/Cubic_function#General_formula_of_roots