document.write( "Question 1098166: A school yard had a length that was 20 more than its width. If it's area was 5376 m^2, what was the length and width of the field? \n" ); document.write( "
Algebra.Com's Answer #712573 by ikleyn(52788)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Let \"x\" be the AVERAGE of the length and the width,\r\n" );
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document.write( "so that the Length = x+10  and  the Width = x-10.\r\n" );
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document.write( "Then the area is Area = L*W = (x+10)*(x-10) = x^2 - 100 = 5376.\r\n" );
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document.write( "So, x^2 = 5376 + 100 = 5476.\r\n" );
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document.write( "Hense, x = \"sqrt%285476%29\" = 74.\r\n" );
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document.write( "Then the Length = 74 + 10 = 84   and  the Width = 74 - 10 = 64.\r\n" );
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\n" ); document.write( "\n" ); document.write( "It is practically MENTAL solution.   ( But you must to know the  T R I C K  ! )\r
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\n" ); document.write( "\n" ); document.write( "See my lesson\r
\n" ); document.write( "\n" ); document.write( "    - HOW TO solve the problem on quadratic equation mentally and avoid boring calculations \r
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\n" ); document.write( "For your info: there is a bunch of lessons on solving quadratic equations in this site:\r
\n" ); document.write( "\n" ); document.write( "    - Introduction into Quadratic Equations\r
\n" ); document.write( "\n" ); document.write( "    - PROOF of quadratic formula by completing the square\r
\n" ); document.write( "\n" ); document.write( "    - HOW TO complete the square - Learning by examples \r
\n" ); document.write( "\n" ); document.write( "    - HOW TO solve quadratic equation by completing the square - Learning by examples \r
\n" ); document.write( "\n" ); document.write( "    - Solving quadratic equations without quadratic formula\r
\n" ); document.write( "\n" ); document.write( "    - Who is who in quadratic equations\r
\n" ); document.write( "\n" ); document.write( "    - Using Vieta's theorem to solve qudratic equations and related problems\r
\n" ); document.write( "\n" ); document.write( "    - Using quadratic equations to solve word problems\r
\n" ); document.write( "\n" ); document.write( "    - HOW TO solve the problem on quadratic equation mentally and avoid boring calculations \r
\n" ); document.write( "\n" ); document.write( "    - OVERVIEW of lessons on solving quadratic equations\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this textbook under the topic \"Quadratic equations\". \r
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\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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