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OpenStudy (anonymous):
find the difference of 9srqt7 and sqrt28
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OpenStudy (anonymous):
\[7\sqrt{7}\]
OpenStudy (anonymous):
\[9\sqrt{7}-\sqrt{28}=9\sqrt{7}-2\sqrt{7}=7\sqrt{7}\]
OpenStudy (anonymous):
thanks
OpenStudy (anonymous):
answer is \[7\sqrt{7}\]
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