Algebra.Com's Answer #3394 by ichudov(507)![\"\"](\"/images/stars/stars-10.gif\")  
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one easy way to do it is to just bite the bullet and solve the equation and then find out sum and product of roots x1 and x2. Another is to note that for equations  , b is the sum of roots and c is their product. \r
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document.write( "that means looking at equation x^2+4x-3/2 = 0. sum is 4, product is -3/2.\r
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document.write( " | Solved by pluggable solver: SOLVE quadratic equation with variable | \n" );
document.write( "Quadratic equation  (in our case  ) has the following solutons:
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document.write( " For these solutions to exist, the discriminant  should not be a negative number.
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document.write( " First, we need to compute the discriminant :  .
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document.write( " Discriminant d=88 is greater than zero. That means that there are two solutions:  .
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document.write( " Quadratic expression  can be factored:
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document.write( " Again, the answer is: 0.345207879911715, -4.34520787991172.\n" );
document.write( "Here's your graph:
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