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I need help simplifying this radical expression: 3√12 + √27 - 2√20 Thanks in...

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jgwirki | Student, Grade 9 | eNoter

Posted May 2, 2013 at 1:42 AM via web

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I need help simplifying this radical expression: 3√12 + √27 - 2√20

Thanks in advance!

Tagged with algebra, math, radicals, simplifying

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oldnick | Valedictorian

Posted May 2, 2013 at 1:49 AM (Answer #1)

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`3sqrt(12)+sqrt(27)-2sqrt(20)=3sqrt(4xx3)+sqrt(3^3)-2sqrt(5xx4)=`

`3sqrt(2^2xx3)+sqrt(3^2xx3)-2sqrt(5xx2^2)=` `3xx2sqrt(3)+3sqrt(3)-2xx2sqrt(5)=`

`=6sqrt(3)+3sqrt(3)-4sqrt(5)=9sqrt(3)-4sqrt(5)`

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