Posted by Kevin on Wednesday, December 14, 2011 at 7:52pm.
Quartics are g=hard to solve, so look for rational roots, if any, where the numerator must be among
±1 ±2 ±4 ±8 ±16
A little synthetic division yields
P(x) = (x-4)(x + 1/2)(x^2+8)
I guess you can find the roots from there...
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