document.write( "Question 256858: OK I have a problem: I have the right answer and I've even had it double checked by my teacher I'm just not sure how I got there.
\n" ); document.write( "The problem is: 2√5+3√20 And I know the right answer is:8√5.
\n" ); document.write( "I just can't remember I got from one to the other. \n" ); document.write( "

Algebra.Com's Answer #188893 by Earlsdon(6294) $\"\"$ $\"About$

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$\"2sqrt%285%29%2B3sqrt%2820%29\"$ Substitute 20 = 4*5
\n" ); document.write( " $\"2sqrt%285%29%2B3sqrt%284%2A5%29\"$ Take the square root of 4 (that's 2) and move it out from under the radical to get:
\n" ); document.write( " $\"2sqrt%285%29%2B3%2A2sqrt%285%29\"$ Simplify and add the radicals.
\n" ); document.write( " $\"2sqrt%285%29%2B6sqrt%285%29+=+highlight%288sqrt%285%29%29\"$ \n" ); document.write( "

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