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Q)

If $i=\sqrt{-1}$, what is the value of $(i+3)(i-\frac{1}{2})?$

$\begin{array}{1 1} (a)\; \frac{5}{2} +\frac{5}{2}i \\ (b)\; \frac{5}{2} (-1+i) \\ (c)\; \frac{-5}{2}(1+i) \\ (d)\; \frac{-5}{2}\end{array}$

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