anonymous
  • anonymous
how do you simplify sqaure roots (radicals)?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
what kind of square roots are you specifically talking about? is it surds or what?
anonymous
  • anonymous
i dont even know what that is, its like a regular one, you have to find a perfect square first to find it.
anonymous
  • anonymous
can you pls give an example

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anonymous
  • anonymous
(radical sign)169, i know the answer is 13 but i have to simplfiy the square root
anonymous
  • anonymous
doesn't the square root have this thing in it
anonymous
  • anonymous
I think we should do this on chat, its kinda hard this way...
anonymous
  • anonymous
cheergirl, what thing? lol
anonymous
  • anonymous
\[\sqrt{169}\] thats what it looks like
anonymous
  • anonymous
the answer is 13
anonymous
  • anonymous
yes, i know but i have to simplifiy it
anonymous
  • anonymous
I really think 13 cannot be simplified..
anonymous
  • anonymous
the square root had to be simplified
anonymous
  • anonymous
This is what my book says: Simplifiy each square root. \[\sqrt{169}\]
anonymous
  • anonymous
simplifying just makes sense when you have expression with variables, e.g sqrt( cos^2(x)+sin^2(x)+1) , otherwise you jusr try to evaluate the square root of the numer, like in thes case, if the answer is not that easy, you could try thongs like this: sqrt(20) = sqrt(5*4) = 2*sqrt(5)
anonymous
  • anonymous
here lets try this one, i guess that one is hard.
anonymous
  • anonymous
Simplifiy each square root: \[\sqrt{121}\]
anonymous
  • anonymous
11
anonymous
  • anonymous
how did you do that pentop?
anonymous
  • anonymous
what i mean is that simplifying means dealing with variables not with numbers, however, \[\sqrt{121}=11\]
anonymous
  • anonymous
well, 11e2=121
anonymous
  • anonymous
sorry, I meant 11squared =121..
anonymous
  • anonymous
yeah there are some roots you ought to memorize 'cause they are too common
anonymous
  • anonymous
i know that it is 11 but i have to simplifiy it, im so confused. i know how to solve them, i cant simplifiy with perfect squares though
anonymous
  • anonymous
simplifying the square root simply means doing the operation of taking the square or making sure that there are no perfect squares under the radical sign. so with your problem, 13 is the simplification of root 169.
anonymous
  • anonymous
exactly...
anonymous
  • anonymous
but how can i show the work for that?
anonymous
  • anonymous
nevermind im not gonna do my homework lol
anonymous
  • anonymous
The only way I can think of to show it is to factor what is under the radical into 11^2 and then the square root of something squared is just that, in this case 11
anonymous
  • anonymous
\[\sqrt{121}\] = \[\sqrt{11 x 11}\] = 11

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