document.write( "Question 1100204: Solve by completing the square. Obtain exact solutions.\r
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Algebra.Com's Answer #714690 by ikleyn(52781)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "a.  x^2 - 8x + 9 = 0.   ====>\r\n" );
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document.write( "    x^2 - 8x = -9       ====>\r\n" );
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document.write( "    x^2 - 2*4x = -9\r\n" );
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document.write( "    x^2 - 2*4x + 4^2 = -9 + 4^2\r\n" );
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document.write( "    \"%28x-4%29%5E2\" = 7  ====>\r\n" );
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document.write( "    x - 4 = +/- \"sqrt%287%29\"\r\n" );
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document.write( "    x = 4 +/- sqrt(7).\r\n" );
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document.write( "b.  2x^2 - 20x - 6 = 0\r\n" );
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document.write( "    your first step is to divide both sides by 2. Then you will get an EQUIVALENT equation\r\n" );
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document.write( "    x^2 - 10x - 3 = 0\r\n" );
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document.write( "    with the leading coefficient just 1, which will make your calculations easier.\r\n" );
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document.write( "    After that, make all the steps that I made for you in the  Solution a  above.\r\n" );
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\n" ); document.write( "\n" ); document.write( "On how to make \"completing the square\" see the lessons\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
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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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