Posted by student on .
solve x^48x^3+64x105=0 given that 2i is one solution.
must be tired cause my steps are not calculating correctly

algebra 
Steve,
what you should do is show how far you got, if you want help.
another root is necessarily 2+i, so
(x^24x+5) divides x^48x^3+64x105
In fact,
x^48x^3+64x105 = (x^24x+5)(x^24x21)
Now it's a piece o' cake, no?