document.write( "Question 1039129: Use the factors to compute the value of the following\r
\n" ); document.write( "\n" ); document.write( "1.) 25^2-15^2
\n" ); document.write( "2.) 62^2-38^2
\n" ); document.write( "3.) 97^2-3^2
\n" ); document.write( "4.) 150^2-149^2
\n" ); document.write( "5.) 1.5^2-0.5^2
\n" ); document.write( "6.) 102^2-98^2
\n" ); document.write( "7.) 303^2-297^2
\n" ); document.write( "8.) 2005^2-2004^2 \n" ); document.write( "

Algebra.Com's Answer #653874 by ikleyn(52814) $\"\"$ $\"About$

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document.write( "1.)  = (25-15)*(25+15) = 10*40 = 400.  <--- Use the formula  = (a-b)*(a+b).\r\n" );
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\n" ); document.write( "\n" ); document.write( "The rest of examples are on the same pattern. Do them yourself.\r
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document.write( "2.) 62^2-38^2\r\n" );
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document.write( "3.) 97^2-3^2\r\n" );
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document.write( "4.) 150^2-149^2\r\n" );
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document.write( "5.) 1.5^2-0.5^2\r\n" );
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document.write( "6.) 102^2-98^2\r\n" );
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document.write( "7.) 303^2-297^2\r\n" );
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document.write( "8.) 2005^2-2004^2\r\n" );
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\n" ); document.write( "\n" ); document.write( "Regarding this formula, $\"a%5E2+-+b%5E2\"$ = $\"%28a-b%29%2A%28a%2Bb%29\"$ , see the lesson The difference of squares formula in this site.\r
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