Nice try, but the correct simplification is
[MATH]\frac{2}{\sqrt{5}} + \frac{3}{2} = \frac{4\sqrt{5} + 15}{10}[/MATH]
If you will follow with me, we will together solve all of them, although, we prefer that you post one question per thread.
Now, let us solve the next one.
[MATH]zw = \ ?[/MATH]