Which number, when placed in the box, will make the equation true?

[tex]\[
\square^2 = \sqrt{64}
\][/tex]

A. [tex]\(\sqrt{8}\)[/tex]

B. [tex]\(\sqrt{32}\)[/tex]

C. 16

D. 32



Answer :

To solve the equation [tex]\( \square^2 = \sqrt{64} \)[/tex], let's follow a step-by-step approach:

1. Calculate [tex]\( \sqrt{64} \)[/tex]:
[tex]\[ \sqrt{64} = 8.0 \][/tex]
So, the equation becomes:
[tex]\[ \square^2 = 8.0 \][/tex]

2. Evaluate the given options to check which one satisfies [tex]\( \square^2 = 8.0 \)[/tex]:

- Option A: [tex]\( \sqrt{8} \)[/tex]
[tex]\[ \sqrt{8} \approx 2.8284271247461903 \][/tex]
Checking if [tex]\((\sqrt{8})^2 = 8.0\)[/tex]:
[tex]\[ (2.8284271247461903)^2 \approx 8.0 \][/tex]
This option satisfies the equation.

- Option B: [tex]\( \sqrt{32} \)[/tex]
[tex]\[ \sqrt{32} \approx 5.656854249492381 \][/tex]
Checking if [tex]\((\sqrt{32})^2 = 8.0\)[/tex]:
[tex]\[ (5.656854249492381)^2 \approx 32.0 \][/tex]
This option does not satisfy the equation.

- Option C: 16
[tex]\[ 16 \][/tex]
Checking if [tex]\((16)^2 = 8.0\)[/tex]:
[tex]\[ 16^2 = 256.0 \][/tex]
This option does not satisfy the equation.

- Option D: 32
[tex]\[ 32 \][/tex]
Checking if [tex]\((32)^2 = 8.0\)[/tex]:
[tex]\[ 32^2 = 1024.0 \][/tex]
This option does not satisfy the equation.

3. Conclusion:
Among the options provided, only [tex]\( \sqrt{8} \approx 2.8284271247461903 \)[/tex] satisfies the equation [tex]\( \square^2 = 8.0 \)[/tex].

Hence, the correct option is A. [tex]\( \sqrt{8} \)[/tex].