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\sqrt{\frac{79}{8}}
Cancel out 0 in both numerator and denominator.
\frac{\sqrt{79}}{\sqrt{8}}
Rewrite the square root of the division \sqrt{\frac{79}{8}} as the division of square roots \frac{\sqrt{79}}{\sqrt{8}}.
\frac{\sqrt{79}}{2\sqrt{2}}
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{\sqrt{79}\sqrt{2}}{2\left(\sqrt{2}\right)^{2}}
Rationalize the denominator of \frac{\sqrt{79}}{2\sqrt{2}} by multiplying numerator and denominator by \sqrt{2}.
\frac{\sqrt{79}\sqrt{2}}{2\times 2}
The square of \sqrt{2} is 2.
\frac{\sqrt{158}}{2\times 2}
To multiply \sqrt{79} and \sqrt{2}, multiply the numbers under the square root.
\frac{\sqrt{158}}{4}
Multiply 2 and 2 to get 4.