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The question says "Simplify. Express in simplest radical form." 3 square root of 3/13  

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tjjavid | Student, Undergraduate | (Level 1) Honors

Posted February 24, 2013 at 10:18 AM via web

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The question says "Simplify. Express in simplest radical form."

3 square root of 3/13
 

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sciencesolve | Teacher | (Level 3) Educator Emeritus

Posted February 24, 2013 at 11:18 AM (Answer #1)

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Supposing that you need to reduce `3sqrt(3/13)` to the simplest form, you need to use the following property of square roots, such that:

`sqrt(a/b) = (sqrt a)/(sqrt b)`

`sqrt(3/13) = (sqrt 3)/(sqrt 13)`

Since you need to reduce the given number to the simplest form, hence, the denominator should not be irrational. You need to rationalize the denominator performing thge multiplication of both, numerator and denominator, by `sqrt 13` , such that:

`3(sqrt 3)/(sqrt 13) = 3((sqrt 3)(sqrt 13))/((sqrt 13)(sqrt 13))`

`3(sqrt 3)/(sqrt 13) = 3((sqrt (3*13)))/13 => 3(sqrt 3)/(sqrt 13) = 3((sqrt (39)))/13`

Hence, reducing the number to the simplest form using the rationalization of denominator, yields `3(sqrt 3)/(sqrt 13) = 3((sqrt (39)))/13.`

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pramodpandey | College Teacher | (Level 3) Valedictorian

Posted February 24, 2013 at 11:23 AM (Answer #2)

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3 squart(3/13)=(3/13)squart(39) Here you need to rationalize denominator.
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mariloucortez | High School Teacher | (Level 3) Adjunct Educator

Posted March 12, 2013 at 1:40 PM (Answer #3)

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To simplify  `3 sqrt(3/13)`   apply the property:  `sqrt(a/b) = sqrt(a)/sqrt(b)`

So you have `3 sqrt(3)/sqrt(13).`

Simplifying radical numbers or expression means that there should be no radical in the denominator part. You do this by rationalizing. It means that you multiply the numerator and denominator by `sqrt(13)`

` 3 sqrt(3)/sqrt(13) * sqrt(13)/sqrt(13)`

 `= 3 (sqrt(3) * sqrt(13))/(sqrt(13)*sqrt(13))`

`= 3 sqrt(3*13)/sqrt(13*13)`

`= 3 sqrt(39)/13`

` `  Therefore the simplified form of `3 sqrt(3/13) = 3 sqrt(39)/13.`

 

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