The roots of the quadratic equation $z^2 + bz + c = 0$ are $4 + 2i$ and $-5 + 8i$. What is $b+c$?
The value of b in z^2 + bz + c = 0 is equal to the sum of the two roots.
It's just 4+2i + (-5)+8i = -1+10i
Thanks! :)
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