$$\sqrt{ \frac{ 225 }{ 50 } }$$
$\frac{3\sqrt{2}}{2}\approx 2.121320344$
$$\sqrt{\frac{9}{2}}$$
$$\frac{\sqrt{9}}{\sqrt{2}}$$
$$\frac{3}{\sqrt{2}}$$
$$\frac{3\sqrt{2}}{\left(\sqrt{2}\right)^{2}}$$
$$\frac{3\sqrt{2}}{2}$$
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