Question

what is $sqrt{169}$?

Explanation:

Step1: Recall square - root definition

The square - root of a number \(x\), \(\sqrt{x}\), is a value \(y\) such that \(y\times y=x\). We need to find a number \(y\) where \(y^2 = 169\).

Step2: Find the number

We know that \(13\times13 = 169\) and \((- 13)\times(-13)=169\). In the context of the principal square - root (the non - negative square - root denoted by \(\sqrt{x}\)), \(\sqrt{169}=13\).

Answer:

13