ABC Theory

[contiga]

I just made a simple workout for the ABC theory, example:

You have the formule: 2x + 3 = 0
You can work this out like.. -3 on both sides, so 2x = - 3
You do it all / 2, and you'll have x = - 1.5... but now
You've got this formule: -33.5x² + 1.5x + 4 = 0, how are we going to do this?
Fill in for;
a: -33.5
b: 1.5
c: 4

PHP Code:

function onCreated() {
  a = - 33.5;
  b = 1.5;
  c = 4;
  /* Don't edit below here */
  xr = "";
  D = ( b ^ 2) - 4 * a * c;
  if ( D > NULL) {
    for ( try: { "-", "+"}) {
      if ( try = "-")
        xr = ( - b - ( D ^ 0.5)) / ( 2 * a);
      else if ( try = "+")
        xr @= " or " @ ( - b + ( D ^ 0.5)) / ( 2 * a);
    }
  }
  else if ( D = NULL) {
    xr = - b / ( 2 * a);
  }
  else
    xr = "No solutions!";
  echo( "Result: " @ xr);
} 


And as you see, the result will be (for 'x' in the formule);
Result: 0.368659933 or -0.323883813

You don't realy have anything that you can use it for in Graal, but whatever, wanted to work it out in a script