Evaluate
6\sqrt{2}+12\approx 20.485281374
Factor
6 \sqrt{2} {(\sqrt{2} + 1)} = 20.485281374
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3\times 2\sqrt{2}+6+6
Factor 8=2^{2}\times 2. Rewrite the square root of the product \sqrt{2^{2}\times 2} as the product of square roots \sqrt{2^{2}}\sqrt{2}. Take the square root of 2^{2}.
6\sqrt{2}+6+6
Multiply 3 and 2 to get 6.
6\sqrt{2}+12
Add 6 and 6 to get 12.
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