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Partial Fraction Decomposition of $\frac{z+4}{(z+1+2i)(z+1-2i)}$
I have the fraction $\frac{z+4}{(z+1+2i)(z+1-2i)}$. I want to partial decompose this fraction, but I am not seeing how to do it. I know that the answer is a=$\frac{1}{2}$+$\frac{3i}{4}$ and b=$\frac{1}...