Square of $\dfrac{2}{7}$ is

Square of $\dfrac{2}{7}$ is
  1. $\dfrac{4}{49}$
  2. $\dfrac{2}{49}$
  3. $\dfrac{4}{7}$
  4. $\dfrac{4}{14}$

Solution

$\left(\dfrac{2}{7}\right)^{2} = \dfrac{2^{2}}{7^{2}} = \dfrac{4}{49}$.

Asked in: NSO

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