Question

Simplify each expression.

${\left(\frac{3}{\sqrt{5}}\right)}^2$

Short answer

The simplified form is,

${\left(\frac{3}{\sqrt{5}}\right)}^2=\frac{9}{5}$.

Step-by-step solution

Step 1. Given information.

The given expression is,

${\left(\frac{3}{\sqrt{5}}\right)}^2$.

Step 2. It can be further written as below.

We have the given expression is ${\left(\frac{3}{\sqrt{5}}\right)}^2$

Then,

$\begin{array}{c}{\left(\frac{3}{\sqrt{5}}\right)}^2=\left(\frac{3}{\sqrt{5}}\right)\left(\frac{3}{\sqrt{5}}\right)\\ =\left(\frac{3^2}{\sqrt{5}\sqrt{5}}\right)\\ =\left(\frac{9}{\sqrt{5^2}}\right)\\ =\left(\frac{9}{5}\right)\end{array}$

Step 3. Neglect negative sign.

Since, square root is positive quantity

So, we neglect negative sign.

Therefore, the simplified form is, ${\left(\frac{3}{\sqrt{5}}\right)}^2=\frac{9}{5}$.