VIII.- Racionalización de denominadores

724.725.
\large \frac{3}{\sqrt{5}}\large \frac{5}{3\sqrt{7}}
726.727.
\large \frac{\sqrt{3}}{4\sqrt{8}}\large \frac{2-\sqrt{5}}{6\sqrt{10}}
728.729.
\large \frac{1}{2+\sqrt{3}}\large \frac{\sqrt{2}}{3-\sqrt{2}}
730.731.
\large \frac{5a\sqrt{a^{2}-b^{2}}}{(1-a)\sqrt{a+b}}\large \frac{(a^{2}-1)\sqrt[4]{8a^{3}}}{(a+1)\sqrt{2ab}}
732.
\large \frac{\sqrt{3}+\sqrt{2}}{\sqrt{3}-\sqrt{2}}
733.
\large \frac{7(3+\sqrt{5})}{(3-\sqrt{5})(3+\sqrt{5})}
734.
\large \frac{7\sqrt{5}}{\sqrt{11}+\sqrt{3}}
735.
\large \frac{a+3b-4\sqrt{ab}+5\sqrt{ac}-5\sqrt{bc}}{\sqrt{a}-\sqrt{b}}
736.
\large \frac{x+\sqrt{x^{2}-1}}{x-\sqrt{x^{2}-1}}-\frac{x-\sqrt{x^{2}-1}}{x+\sqrt{x^{2}-1}}

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