Question

11. Find the square root of
$11 + 2 \sqrt{30}$
​

Answer 1

Answer:

\begin{gathered} \sqrt{11} + 2 \sqrt{30} \\ \\ = \sqrt{(11 + 2)} \times 30 \\ \\ = \sqrt{13 \times 30} \\ \\ = \sqrt{390} \end{gathered}

11

+2

30

=

(11+2)

×30

=

13×30

=

390

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