Evaluate
\frac{6\sqrt{2}}{7}-4\approx -2.787816947
Factor
\frac{2 {(3 \sqrt{2} - 14)}}{7} = -2.787816946537347
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\frac{3}{7}\times 2\sqrt{2}-4
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}.
\frac{3\times 2}{7}\sqrt{2}-4
Express \frac{3}{7}\times 2 as a single fraction.
\frac{6}{7}\sqrt{2}-4
Multiply 3 and 2 to get 6.
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