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  4. Express each of the following in the form of a + ib. (5-3i)3

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Q. Express each of the following in the form of $a + ib$.
$\left(5-3i\right)^{3}$

Complex Numbers and Quadratic Equations

Solution:

$\left(5-3i\right)^{3}$
$=125-225i-135+27i$
$=-10-198 i$