Evaluate
\sqrt{14}+2\sqrt{7}+7\approx 16.033160009
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2\sqrt{7}+\left(\sqrt{7}\right)^{2}+\sqrt{7}\sqrt{2}
Use the distributive property to multiply \sqrt{7} by 2+\sqrt{7}+\sqrt{2}.
2\sqrt{7}+7+\sqrt{7}\sqrt{2}
The square of \sqrt{7} is 7.
2\sqrt{7}+7+\sqrt{14}
To multiply \sqrt{7} and \sqrt{2}, multiply the numbers under the square root.
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