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campbell_stBest ResponseYou've already chosen the best response.1
\[\sqrt{\frac{10}{121}} = \pm \frac{\sqrt{10}}{11}\]
 one year ago

alexwee123Best ResponseYou've already chosen the best response.0
dw:1335940997334:dw
 one year ago

thomas5267Best ResponseYou've already chosen the best response.0
The square of something is always positive. So the correct answer should be \(\frac{\sqrt{10}}{11}\).
 one year ago

campbell_stBest ResponseYou've already chosen the best response.1
ok... so \[\sqrt{\frac{10}{(11)^2}} \neq \sqrt{\frac{10}{121}}\]
 one year ago

thomas5267Best ResponseYou've already chosen the best response.0
Sorry, I mean the square root of real numbers are always positive. Sources: http://mathworld.wolfram.com/SquareRoot.html http://en.wikipedia.org/wiki/Square_root
 one year ago
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