Evaluate
5\sqrt{2}+6\approx 13.071067812
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5\sqrt{2}+3\left(\sqrt{2}\right)^{2}
Use the distributive property to multiply \sqrt{2} by 5+3\sqrt{2}.
5\sqrt{2}+3\times 2
The square of \sqrt{2} is 2.
5\sqrt{2}+6
Multiply 3 and 2 to get 6.
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