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OpenStudy (anonymous):
Simplify each sum or difference 4sqrt{7}-sqrt{63}
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OpenStudy (radar):
\[4\sqrt{7}-\sqrt{63}=4\sqrt{7}-\sqrt{9}\sqrt{7}=4\sqrt{7}-3\sqrt{7}=\sqrt{7}\]
OpenStudy (anonymous):
So the simplified answer would be \[\sqrt{7}\] ?
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