I am trying to answer the following question:
The roots of the quadratic equation $ax^2-16x+25$ are $2+mi$ and $2-mi$, where $m>0$. Compute the sum of $a+m$.
Should the zeros of the equation be $x-(2+mi)$ and $x-(2-mi)$ or $x-2+mi$ and $x-2-mi$, or maybe something else? I really have no idea.