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The roots of the quadratic equation $z^2 + bz + c = 0$ are $4 + 2i$ and $-5 + 8i$. What is $b+c$?

 May 19, 2024
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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! :)

 May 20, 2024

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