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OpenStudy (anonymous):
How do you simplify 2√5 + √45
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OpenStudy (studygurl14):
\[2\sqrt{5} +\sqrt{9 \times 5} \rightarrow 2\sqrt{5}+3\sqrt{5} = 5\sqrt{5}\]
OpenStudy (anonymous):
Thank you!!
OpenStudy (anonymous):
Wait, where do you get the 3√5 from?
OpenStudy (anonymous):
\[3\sqrt{5}\] from
OpenStudy (studygurl14):
because \[\sqrt{9} = 3\] So...\[\sqrt{9\times5} = 3\sqrt{5}\]
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