document.write( "Question 81337: please check this for me?\r
\n" ); document.write( "\n" ); document.write( "7x^2+18-9\r
\n" ); document.write( "\n" ); document.write( "x=-b+-sqrt $\"b%5E2-4ac\"$ /2a
\n" ); document.write( "x=-18+-sqrt $\"18%5E2%2B4%2A7%2A9\"$ /2*7
\n" ); document.write( "x=(-18+24)/2*7
\n" ); document.write( "x=6/14=3/7
\n" ); document.write( "x=-42/14=-3
\n" ); document.write( "x=-3,7 \n" ); document.write( "

Algebra.Com's Answer #58663 by vertciel(183) $\"\"$ $\"About$

You can put this solution on YOUR website!
Hello there,\r
\n" ); document.write( "\n" ); document.write( "x = 3/7 and x = -3 is correct.\r
\n" ); document.write( "\n" ); document.write( "You actually could have solved this question more easily, by factoring the quadratic:\r
\n" ); document.write( "\n" ); document.write( "(7x - 3)(x + 3)\r
\n" ); document.write( "\n" ); document.write( "Now you can see that x MUST be x = 3/7 and x = - 3.\r
\n" ); document.write( "\n" ); document.write( "Also, you could have graphed this quadratic with your calculator to see if your x -intercepts are right. \n" ); document.write( "

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