Evaluate
48-\sqrt{42}\approx 41.519259302
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8\left(\sqrt{6}\right)^{2}-\sqrt{6}\sqrt{7}
Use the distributive property to multiply \sqrt{6} by 8\sqrt{6}-\sqrt{7}.
8\times 6-\sqrt{6}\sqrt{7}
The square of \sqrt{6} is 6.
48-\sqrt{6}\sqrt{7}
Multiply 8 and 6 to get 48.
48-\sqrt{42}
To multiply \sqrt{6} and \sqrt{7}, multiply the numbers under the square root.
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