\(\sqrt{x^{4}y^{11}},\ \) \(если\ x \neq 0 \Longrightarrow\)
\[\sqrt{x^{4}y^{11}} = x^{2}\sqrt{y^{11}} =\]
\[= x^{2}\sqrt{y^{10} \cdot y} = x^{2}\left| y^{5} \right|\sqrt{y}.\]