document.write( "Question 177144: How do I use the quadratic formula in this problem that one solution ends up being a fraction? 2x2-7x=-5. I know you have to put it in standard form first which is 2x2+7x-5. \n" ); document.write( "
Algebra.Com's Answer #132195 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
\r
\n" ); document.write( "\n" ); document.write( "\"2x%5E2-7x=-5\" Start with the given equation.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"2x%5E2-7x%2B5=0\" Get all terms to the left side.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Notice we have a quadratic equation in the form of \"ax%5E2%2Bbx%2Bc\" where \"a=2\", \"b=-7\", and \"c=5\"\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Let's use the quadratic formula to solve for x\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4ac+%29%29%2F%282a%29\" Start with the quadratic formula\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-%28-7%29+%2B-+sqrt%28+%28-7%29%5E2-4%282%29%285%29+%29%29%2F%282%282%29%29\" Plug in \"a=2\", \"b=-7\", and \"c=5\"\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+%287+%2B-+sqrt%28+%28-7%29%5E2-4%282%29%285%29+%29%29%2F%282%282%29%29\" Negate \"-7\" to get \"7\". \r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+%287+%2B-+sqrt%28+49-4%282%29%285%29+%29%29%2F%282%282%29%29\" Square \"-7\" to get \"49\". \r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+%287+%2B-+sqrt%28+49-40+%29%29%2F%282%282%29%29\" Multiply \"4%282%29%285%29\" to get \"40\"\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+%287+%2B-+sqrt%28+9+%29%29%2F%282%282%29%29\" Subtract \"40\" from \"49\" to get \"9\"\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+%287+%2B-+sqrt%28+9+%29%29%2F%284%29\" Multiply \"2\" and \"2\" to get \"4\". \r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+%287+%2B-+3%29%2F%284%29\" Take the square root of \"9\" to get \"3\". \r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+%287+%2B+3%29%2F%284%29\" or \"x+=+%287+-+3%29%2F%284%29\" Break up the expression. \r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+%2810%29%2F%284%29\" or \"x+=++%284%29%2F%284%29\" Combine like terms. \r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x+=+5%2F2\" or \"x+=+1\" Simplify. \r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "So the answers are \"x+=+5%2F2\" or \"x+=+1\" \r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" );