document.write( "Question 73433: I don't know how to write out the problem, but I'll try my best so you can understand it. The problem I have is -3 square root of 20 times square root of 15. The answer I came to was -30 square root of 3. Is this correct? \n" ); document.write( "

Algebra.Com's Answer #52548 by Cintchr(481) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+-3sqrt%2820%29+%2A+sqrt%2815%29+\"$
\n" ); document.write( "Since you are multiplying, you can combine your square roots right away
\n" ); document.write( " $\"+-3sqrt%2820%2A15%29+\"$
\n" ); document.write( "Break the 20 and the 15 up into Prime factors
\n" ); document.write( " $\"+-3sqrt%282%2A2%2A5%2A5%2A3%29+\"$
\n" ); document.write( "Since we are doing square roots, we pull numbers out from under the radical in pairs, but only one stays.
\n" ); document.write( " $\"+-3%282%29%285%29sqrt%283%29+\"$
\n" ); document.write( "Multiply the co-efficients
\n" ); document.write( " $\"+-30sqrt%283%29+\"$
\n" ); document.write( "You were right!! \n" ); document.write( "

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