document.write( "Question 134295: 3 radical 7 - 2 radical 28 \n" ); document.write( "

Algebra.Com's Answer #98214 by jim_thompson5910(35256) $\"\"$ $\"About$

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$\"3%2Asqrt%287%29-2%2Asqrt%2828%29\"$ Start with the given expression\r
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\n" ); document.write( "\n" ); document.write( " $\"3%2Asqrt%287%29-2%2A2%2Asqrt%287%29\"$ Simplify $\"sqrt%2828%29\"$ to get $\"2%2Asqrt%287%29\"$ . Note: If you need help with simplifying square roots, check out this solver.\r
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\n" ); document.write( "\n" ); document.write( " $\"3%2Asqrt%287%29-4%2Asqrt%287%29\"$ Multiply 2 and 2 to get 4.\r
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\n" ); document.write( "\n" ); document.write( "Since we have the common term $\"sqrt%287%29\"$ , we can combine like terms\r
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\n" ); document.write( "\n" ); document.write( " $\"%283-4%29sqrt%287%29\"$ Combine like terms. \r
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\n" ); document.write( "\n" ); document.write( " $\"-1%2Asqrt%287%29\"$ Now simplify $\"3-4\"$ to get $\"-1\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"-sqrt%287%29\"$ Simplify \r
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\n" ); document.write( "\n" ); document.write( "So $\"3%2Asqrt%287%29-2%2Asqrt%2828%29\"$ simplifies to $\"-sqrt%287%29\"$ . In other words, $\"3%2Asqrt%287%29-2%2Asqrt%2828%29=-sqrt%287%29\"$ \n" ); document.write( "

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