document.write( "Question 76245: I cannot understand how to multiply: $\"%283x%5E2+-4xy+-5y%5E2%29%5E2\"$ . Please help me. \n" ); document.write( "

Algebra.Com's Answer #54711 by Edwin McCravy(20060) $\"\"$ $\"About$

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document.write( "Learn the rule:\r\n" );
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document.write( "The square of the sum of any number of terms =\r\n" );
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document.write( "       The sum of all the squares of the terms +  \r\n" );
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document.write( "              The sum of TWICE THE PRODUCT of every possible pair of terms. \r\n" );
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document.write( "When there are three terms:\r\n" );
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document.write( "So your problem is:\r\n" );
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document.write( " = \r\n" );
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document.write( " =\r\n" );
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document.write( "   \r\n" );
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document.write( "There are only two like terms to combine,  and \r\n" );
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document.write( "It is customary to arrange the terms is descending order \r\n" );
document.write( "of powers of one of the letters, usually the one that \r\n" );
document.write( "comes first in the alphabet.  Here it is arranged in \r\n" );
document.write( "descending order of powers of x:\r\n" );
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document.write( "Edwin

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