Question

$\sqrt{28 \times \sqrt{63} }$
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Answer 1

$\sqrt{63} = 8$

Therefore ,

$\sqrt{28 \times 8} = \sqrt{223}$

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Answer 2

Answer:

$\sqrt{4.7} + \sqrt{9.7} \\ 2\sqrt{7} + 3 \sqrt{7} \\ 5 \sqrt{7}$