# What's the square root of 17?

Jul 11, 2015

$\sqrt{17} \cong 4.123$ is the number which when squared gives $17$

It is an irrational number. That is, it cannot be expressed as $\frac{p}{q}$ for integers $p$ and $q$ with $q \ne 0$

#### Explanation:

Actually $17$ has two square roots.

We call the positive one $\sqrt{17} \cong 4.123$

The negative one is $- \sqrt{17} \cong - 4.123$