document.write( "Question 1204191: what two numbers add to -4 and multiply to 5 \n" ); document.write( "

Algebra.Com's Answer #840282 by ikleyn(52795) $\"\"$ $\"About$

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document.write( "According to Vieta's theorem, these two numbers are the roots of the quadratic equation\r\n" );
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document.write( "    x^2 + 4x + 5 = 0.\r\n" );
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document.write( "From here, it is easy to find these numbers\r\n" );
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document.write( "    (x^2 + 4x + 4) + 1 = 0\r\n" );
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document.write( "      = -1\r\n" );
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document.write( "     x + 2 =  = +/- i\r\n" );
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document.write( "     x = -2 +/- i,\r\n" );
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document.write( "where \"i\" is the imaginary unit.\r\n" );
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