Evaluate
4\left(\sqrt{11}-3\right)\approx 1.266499161
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\sqrt{11}-3\left(4-\sqrt{11}\right)
Multiply -1 and 3 to get -3.
\sqrt{11}-12+3\sqrt{11}
Use the distributive property to multiply -3 by 4-\sqrt{11}.
4\sqrt{11}-12
Combine \sqrt{11} and 3\sqrt{11} to get 4\sqrt{11}.
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