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OpenStudy (anonymous):
combine the expressions
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OpenStudy (anonymous):
\[2\sqrt{k}+\sqrt{k}-3\sqrt{k}\]
OpenStudy (anonymous):
is it \[-\sqrt{k}\] ?
OpenStudy (lgbasallote):
nope
OpenStudy (lgbasallote):
look at \(\sqrt k\) as x what is 2x + x - 3x?
OpenStudy (anonymous):
-2x
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OpenStudy (lgbasallote):
what is 2x + x?
OpenStudy (anonymous):
oh 0?
OpenStudy (lgbasallote):
yes
OpenStudy (lgbasallote):
2x + x - 3x = 0
OpenStudy (anonymous):
so its 0 too right
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OpenStudy (lgbasallote):
\[2\sqrt k + \sqrt k - 3\sqrt k = 0\] yes
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