Select all the correct answers.

Which expressions are equivalent to the given expression?

[tex]\sqrt{252}[/tex]

A. [tex]7 \sqrt{6}[/tex]

B. [tex]126^{\frac{1}{2}}[/tex]

C. [tex]6 \sqrt{7}[/tex]

D. [tex]18 \sqrt{7}[/tex]

E. [tex]252^{\frac{1}{2}}[/tex]



Answer :

To determine which expressions are equivalent to the given expression [tex]\(\sqrt{252}\)[/tex], we need to evaluate each one and compare it to [tex]\(\sqrt{252}\)[/tex].

First, we calculate the value of [tex]\(\sqrt{252}\)[/tex]:

[tex]\[ \sqrt{252} \approx 15.874507866387544 \][/tex]

Next, we compare [tex]\(\sqrt{252}\)[/tex] with each of the given expressions:

1. [tex]\(7 \sqrt{6}\)[/tex]:
[tex]\[ 7 \sqrt{6} \approx 7 \times 2.449489742783178 = 17.146428199482244 \][/tex]
This is not equal to [tex]\(\sqrt{252}\)[/tex].

2. [tex]\(126^{\frac{1}{2}}\)[/tex]:
[tex]\[ 126^{\frac{1}{2}} = \sqrt{126} \approx 11.224972160321824 \][/tex]
This is not equal to [tex]\(\sqrt{252}\)[/tex].

3. [tex]\(6 \sqrt{7}\)[/tex]:
[tex]\[ 6 \sqrt{7} \approx 6 \times 2.6457513110645906 = 15.874507866387544 \][/tex]
This is equal to [tex]\(\sqrt{252}\)[/tex].

4. [tex]\(18 \sqrt{7}\)[/tex]:
[tex]\[ 18 \sqrt{7} \approx 18 \times 2.6457513110645906 = 47.62352359916263 \][/tex]
This is not equal to [tex]\(\sqrt{252}\)[/tex].

5. [tex]\(252^{\frac{1}{2}}\)[/tex]:
[tex]\[ 252^{\frac{1}{2}} = \sqrt{252} \approx 15.874507866387544 \][/tex]
This is obviously equal to [tex]\(\sqrt{252}\)[/tex].

From the calculations, the expressions that are equivalent to [tex]\(\sqrt{252}\)[/tex] are:

[tex]\[ 6 \sqrt{7} \quad \text{and} \quad 252^{\frac{1}{2}} \][/tex]

Therefore, the correct answers are:

[tex]\[ \boxed{6 \sqrt{7}} \quad \text{and} \quad \boxed{252^{\frac{1}{2}}} \][/tex]