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alyssababy7
Group Title
simplify the radical expression.
(square root of 10/121)
 2 years ago
 2 years ago
alyssababy7 Group Title
simplify the radical expression. (square root of 10/121)
 2 years ago
 2 years ago

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campbell_st Group TitleBest ResponseYou've already chosen the best response.1
\[\sqrt{\frac{10}{121}} = \pm \frac{\sqrt{10}}{11}\]
 2 years ago

alexwee123 Group TitleBest ResponseYou've already chosen the best response.0
dw:1335940997334:dw
 2 years ago

thomas5267 Group TitleBest ResponseYou've already chosen the best response.0
The square of something is always positive. So the correct answer should be \(\frac{\sqrt{10}}{11}\).
 2 years ago

thomas5267 Group TitleBest ResponseYou've already chosen the best response.0
@campbell_st
 2 years ago

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

thomas5267 Group TitleBest 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
 2 years ago
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