document.write( "Question 1209774: Two numba ?*?=-5 and when added +5 \n" ); document.write( "

Algebra.Com's Answer #850333 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "Starting equations\r\n" );
document.write( "\r\n" );
document.write( "    x *y =  -5     (1)\r\n" );
document.write( "    x + y =  5     (2)\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "From equation (2), express  y = 5 - x and substitute it into equation (1).\r\n" );
document.write( "\r\n" );
document.write( "    x*(5-x) = -5.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Simplify\r\n" );
document.write( "\r\n" );
document.write( "    5x - x^2 = -5,\r\n" );
document.write( "\r\n" );
document.write( "    x^2 - 5x - 5 = 0.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Solve quadratic equation using the quadratic formula\r\n" );
document.write( "\r\n" );
document.write( "     =  =  = .\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The numbers are   = 5.854101966 and   -0.854101966.    ANSWER\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "CHECK.  5.854101966*(-0.854101966) = -5.0000000000 with at least 10 decimals after the decimal dot.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );