document.write( "Question 65817: Solve for X:
\n" ); document.write( "x^2+4x+4=7
\n" ); document.write( "The answer I recieved was:
\n" ); document.write( "X=.645
\n" ); document.write( "My teacher has said this is wrong and is not in algebra format. Can someone please help me with the answer and the correct format? Thank you so much for the wonderful help this site brings me and many others. \n" ); document.write( "
Algebra.Com's Answer #46552 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
Solve for X:\r\n" );
document.write( "x^2+4x+4=7\r\n" );
document.write( "The answer I recieved was:\r\n" );
document.write( "X=.645\r\n" );
document.write( "My teacher has said this is wrong and is not in\r\n" );
document.write( "algebra format. Can someone please help me with \r\n" );
document.write( "the answer and the correct format? Thank you so \r\n" );
document.write( "much for the wonderful help this site brings me \r\n" );
document.write( "and many others.\r\n" );
document.write( "\r\n" );
document.write( "Get 0 on the right by adding -7 to both sides\r\n" );
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document.write( "           x² + 4x + 4 = 7\r\n" );
document.write( "                    -7  -7\r\n" );
document.write( "           ---------------\r\n" );
document.write( "           x² + 4x - 3 = 0\r\n" );
document.write( "\r\n" );
document.write( "That won't factor, so we use the quadratic formula:\r\n" );
document.write( "                  ______ \r\n" );
document.write( "            -b ± Öb²-4ac\r\n" );
document.write( "        x = —————————————\r\n" );
document.write( "                2a \r\n" );
document.write( "\r\n" );
document.write( "where a = 1; b = 4; c = -3\r\n" );
document.write( "\r\n" );
document.write( "                     _____________ \r\n" );
document.write( "             -(4) ± Ö(4)²-4(1)(-3)\r\n" );
document.write( "        x = ————————————————————————\r\n" );
document.write( "                     2(1) \r\n" );
document.write( "                   _____ \r\n" );
document.write( "             -4 ± Ö16+12\r\n" );
document.write( "        x = —————————————\r\n" );
document.write( "                 2\r\n" );
document.write( "\r\n" );
document.write( "                   __ \r\n" );
document.write( "             -4 ± Ö28\r\n" );
document.write( "        x = ——————————\r\n" );
document.write( "                2\r\n" );
document.write( "\r\n" );
document.write( "                   ___ \r\n" );
document.write( "             -4 ± Ö4·7\r\n" );
document.write( "        x = ———————————\r\n" );
document.write( "                2 \r\n" );
document.write( "\r\n" );
document.write( "                   _\r\n" );
document.write( "            -4 ± 2Ö7\r\n" );
document.write( "        x = —————————\r\n" );
document.write( "                2\r\n" );
document.write( "\r\n" );
document.write( "                     _\r\n" );
document.write( "            -4     2Ö7\r\n" );
document.write( "        x = ——— ± —————\r\n" );
document.write( "             2      2\r\n" );
document.write( "                  _\r\n" );
document.write( "        x = -2 ± Ö7 \r\n" );
document.write( "                       _\r\n" );
document.write( "Using the +, x = -2 + Ö7, which\r\n" );
document.write( "is one solution and equals about .6457513111,\r\n" );
document.write( "so your answer of .645 is close to that, but rounded \r\n" );
document.write( "off to thousandths should be .646, not .645.\r\n" );
document.write( "                       _ \r\n" );
document.write( "Using the -, x = -2 - Ö7, which\r\n" );
document.write( "is the other solution and equals about -4.645751311\r\n" );
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document.write( "However the solutions that your teacher wants are\r\n" );
document.write( "                  _\r\n" );
document.write( "        x = -2 ± Ö7\r\n" );
document.write( "\r\n" );
document.write( "Edwin
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