Answer :

To simplify [tex]\(\sqrt{99}\)[/tex], we can follow these steps:

1. Factorize 99 into its prime factors:
[tex]\[ 99 = 3 \times 3 \times 11 \][/tex]
which can be written as:
[tex]\[ 99 = 3^2 \times 11 \][/tex]

2. Express the square root of 99 in terms of these factors:
[tex]\[ \sqrt{99} = \sqrt{3^2 \times 11} \][/tex]

3. Utilize the property of square roots that states [tex]\(\sqrt{a \times b} = \sqrt{a} \times \sqrt{b}\)[/tex]:
[tex]\[ \sqrt{99} = \sqrt{3^2 \times 11} = \sqrt{3^2} \times \sqrt{11} \][/tex]

4. Simplify [tex]\(\sqrt{3^2}\)[/tex]:
[tex]\[ \sqrt{3^2} = 3 \][/tex]

5. Combine the simplified parts:
[tex]\[ \sqrt{99} = 3 \times \sqrt{11} \][/tex]

Thus, the simplified form of [tex]\(\sqrt{99}\)[/tex] is:
[tex]\[ \boxed{3\sqrt{11}} \][/tex]