Question 1179611
{{{z^3-z^2-41z+105=0}}}

<pre>
5   |    1    -1    -41    105
    |          5     20   -105
    |___________________________
         1     4     -21   0
</pre>
{{{(z-5)(z^2+4z-21)=0}}}, and quadratic is easily factorable.


{{{highlight((z-5)(z+7)(z-3)=0)}}}