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Mathematics 9 Online
OpenStudy (anonymous):

-6√40 - 4√90 + 4√10

OpenStudy (anonymous):

\[-6*2\sqrt{10}-4*3\sqrt{10}+4\sqrt{10}=-20\sqrt{10}\]

OpenStudy (hoblos):

\[-20\sqrt{10}\]

OpenStudy (anonymous):

:)

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