Question

what is $sqrt{121}$?

Explanation:

Step1: Recall square - root definition

The square root of a number \(x\) is a value \(y\) such that \(y\times y=x\). We need to find a number \(y\) where \(y^2 = 121\).

Step2: Find the number

We know that \(11\times11 = 121\) and \((- 11)\times(-11)=121\). In the case of the principal square root (denoted by \(\sqrt{x}\) where \(x\geq0\)), \(\sqrt{121}=11\).

Answer:

11