Evaluate
4\sqrt{11}-77\approx -63.733500839
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4\sqrt{11}-7\left(\sqrt{11}\right)^{2}
Use the distributive property to multiply \sqrt{11} by 4-7\sqrt{11}.
4\sqrt{11}-7\times 11
The square of \sqrt{11} is 11.
4\sqrt{11}-77
Multiply -7 and 11 to get -77.
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