MCQ
Which one of the following is a rational number?
- ✓$(\sqrt{2})^{2}$
- B$2\sqrt{2}$
- C$2+\sqrt{2}$
- D$\frac{\sqrt{2}}{2}$
✓
Answer
Correct option: A.
$(\sqrt{2})^{2}$
$(\sqrt{2})^{2} = \sqrt{2}\times\sqrt{2} = {2}$
So $(\sqrt{2})^{2}$ is a rational number.
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