document.write( "Question 604245: explain the squareroot of 180 minus the squareroot of 5 \n" ); document.write( "
Algebra.Com's Answer #381036 by bucky(2189)\"\" \"About 
You can put this solution on YOUR website!
The problem you are given is to simplify:
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\n" ); document.write( "\"sqrt%28180%29+-+sqrt%285%29\"
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\n" ); document.write( "Begin by factoring the 180. Since this problem has the goal of teaching you something about simplifying radicals, you can assume the likelihood that 5 is a good factor to try and that somehow the square root of 5 will be involved in both terms of the expression you are given. So factoring 5 from 180 results in the two term expression becoming:
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\n" ); document.write( "\"sqrt%2836%2A5%29+-+sqrt%285%29\"
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\n" ); document.write( "But, by the rules of radicals, the first term can now become the product of the radicals of the two factors and the expression is then:
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\n" ); document.write( "\"sqrt%2836%29%2Asqrt%285%29+-+sqrt%285%29\"
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\n" ); document.write( "Next, note that the square root of 36 is 6. Substituting 6 for the square root of 36 results in:
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\n" ); document.write( "\"6%2Asqrt%285%29+-+sqrt%285%29\"
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\n" ); document.write( "Then note that the square root of 5 is a common factor of both terms. If you factor it from both of the terms you get the distributed multiplication:
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\n" ); document.write( "\"%286+-+1%29%2Asqrt%285%29\"
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\n" ); document.write( "and in the parentheses you can subtract 1 from 6 to get 5. Substituting this 5 for (6 - 1) gives the answer:
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\n" ); document.write( "\"5%2Asqrt%285%29\"
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\n" ); document.write( "And this is a step-by-step method of solving the given problem.
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\n" ); document.write( "I hope this helps you to understand some procedures you can use when working with radicals to simplify algebraic expressions.
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