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\sqrt{\frac{3\times 11}{2\times 49}}
Cancel out 9 in both numerator and denominator.
\sqrt{\frac{33}{2\times 49}}
Multiply 3 and 11 to get 33.
\sqrt{\frac{33}{98}}
Multiply 2 and 49 to get 98.
\frac{\sqrt{33}}{\sqrt{98}}
Rewrite the square root of the division \sqrt{\frac{33}{98}} as the division of square roots \frac{\sqrt{33}}{\sqrt{98}}.
\frac{\sqrt{33}}{7\sqrt{2}}
Factor 98=7^{2}\times 2. Rewrite the square root of the product \sqrt{7^{2}\times 2} as the product of square roots \sqrt{7^{2}}\sqrt{2}. Take the square root of 7^{2}.
\frac{\sqrt{33}\sqrt{2}}{7\left(\sqrt{2}\right)^{2}}
Rationalize the denominator of \frac{\sqrt{33}}{7\sqrt{2}} by multiplying numerator and denominator by \sqrt{2}.
\frac{\sqrt{33}\sqrt{2}}{7\times 2}
The square of \sqrt{2} is 2.
\frac{\sqrt{66}}{7\times 2}
To multiply \sqrt{33} and \sqrt{2}, multiply the numbers under the square root.
\frac{\sqrt{66}}{14}
Multiply 7 and 2 to get 14.