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OpenStudy (anonymous):
rationalize the denominator and simplify the answer: sqrt x/ sqrt x - sqrt 7
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OpenStudy (anonymous):
ok multiply top and bottom by \[\sqrt{x}+\sqrt{7}\]
OpenStudy (anonymous):
the denominator will be \[(\sqrt{x}-\sqrt{7})(\sqrt{x}+\sqrt{7})=x-7\]
OpenStudy (anonymous):
then numerator will be whatever you get when you multiply out
OpenStudy (anonymous):
ok thx
OpenStudy (anonymous):
\[\sqrt{x}(\sqrt{x}+\sqrt{7})=x+\sqrt{7x}\]
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