Question

$\sqrt{9} + \sqrt{81}$
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Answer 1

$\sqrt{9} + \sqrt{81}$

$\sqrt{9} = 3 \\ \sqrt{81} = 9$

$3 + 9 = 12$

Answer 2

$= \sqrt{9} + \sqrt{81}$

$\sqrt{9 } = 3$

$\sqrt{81} = 9$

$= 9 + 3$

$= 12$