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Mathematics 9 Online
OpenStudy (anonymous):

Math Question Please Help

OpenStudy (anonymous):

OpenStudy (anonymous):

which one of those numbers under the radical is a perfect square? that is the one whose square root is rational.

OpenStudy (anonymous):

Not sure

OpenStudy (secret-ninja):

You just have to find the square root of each one, and the one who does NOT have a decimal as an answer is the right one. :)

OpenStudy (secret-ninja):

Lets try the first one. You have to find what 15 squared equals. To do this, just get a calculator and type in 15, and then the \[\sqrt\] sign.

OpenStudy (secret-ninja):

That didn't type it... but you get the idea. |dw:1414423995845:dw| that thing

OpenStudy (secret-ninja):

Your answer would be 3.8729833462 and that is not a perfect square... so you have to try the next number. Do you want to try it now?

OpenStudy (secret-ninja):

It is 16 squared. the answer is 4. 16 is your answer.

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