Question

√18 +√72

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Answer 1

Answer:

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Answer 2

Answer:

$\sqrt{18} = \sqrt{9 \times 2} = 3 \sqrt{2} \\ \sqrt{72} = \sqrt{36 \times 2} = 6 \sqrt{2} \\ \sqrt{18} + \sqrt{72} = 3 \sqrt{2} + 6 \sqrt{2} \\ = 9 \sqrt{2}$

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