$\sqrt{2} \cdot \sqrt{2}$ equals

$\sqrt{2} \cdot \sqrt{2}$ equals
  1. $2$
  2. $\sqrt{4}$
  3. $2\sqrt{2}$
  4. $4$

Solution

$\sqrt{a} \cdot \sqrt{a} = a$.

Asked in: MH-SSC-9

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