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2 radical 2 divided by radical 5
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\[\frac{2 \sqrt{2}}{\sqrt{5}}\] Do you want to rationalize the denominator ?
yes
Try multiply the top and bottom by what is on bottom
\[\frac{2 \sqrt{2}}{\sqrt{5}} \cdot \frac{\sqrt{5}}{\sqrt{5}}=\frac{?}{?}\]
what does sqrt(5)*sqrt(5) give us?
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radical 2 over 5
well sqrt(5)*sqrt(5) is 5
Oh okay, thanks
\[\frac{2 \sqrt{2} \sqrt{5}}{5}\]
so what is sqrt(2)*sqrt(5)?
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of what is sqrt(2*5)=?
2*5=?
10
so sqrt(2)*sqrt(5)=sqrt(10)
in symbols \[\sqrt{2} \cdot \sqrt{5}=\sqrt{10}\]
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oh okay. I kinda get it now..
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