Evaluate
40\sqrt{2}\approx 56.568542495
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80\times \frac{1}{\sqrt{2}}
Multiply 2 and 40 to get 80.
80\times \frac{\sqrt{2}}{\left(\sqrt{2}\right)^{2}}
Rationalize the denominator of \frac{1}{\sqrt{2}} by multiplying numerator and denominator by \sqrt{2}.
80\times \frac{\sqrt{2}}{2}
The square of \sqrt{2} is 2.
40\sqrt{2}
Cancel out 2, the greatest common factor in 80 and 2.
Examples
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Matrix
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Simultaneous equation
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Integration
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Limits
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