If `z_1=2-i ,\ z_2=-2+i ,` find : `R e((z_1z_2)/bar(z_1))`

Explanation

To solve the problem step by step, we need to find the real part of the expression \(\frac{z_1 z_2}{\bar{z_1}}\), where \(z_1 = 2 - i\) and \(z_2 = -2 + i\).

### Step 1: Calculate \(z_1 z_2\)
We start by multiplying \(z_1\) and \(z_2\):
\[ z_1 z_2 = (2 - i)(-2 + i) \]
Using the distributive property (FOIL method):
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