var a,b,c,x1,x2;

function getValues() {
  signB = (document.form.firstSign.value == "+") ? 1 : -1;
  signC = (document.form.secondSign.value == "+") ? 1 : -1;
  a = document.form.x2Coef.value;
  b = document.form.xCoef.value * signB;
  c = document.form.endValue.value * signC;
}

function solveForX() {
  x1 = ((-1*b) + Math.sqrt((b*b) - 4*a*c))/ (2*a);
  x2 = ((-1*b) - Math.sqrt((b*b) - 4*a*c))/ (2*a);
  
  if(document.form.round.checked){
  x1 = Math.round(x1*1000)/1000;
  x2 = Math.round(x2*1000)/1000;
  }
}

function factorEq() {
  if( (Boolean(x1) != false) && (Boolean(x2) != false)) {
    x1Print = ((x1 * -1) > 0) ? "+" + (x1*-1) : x1 * -1;
    x2Print = ((x2 * -1) > 0) ? "+" + (x2*-1) : x2 * -1;
    aPrint = (a > 1 || a < 0) ? a : "";
    document.getElementById('testing').innerHTML = "<font color=\"red\">The Solutions Are:</font><br>x1 = " + x1 + "; x2 = " + x2 + "<br><font color=\"red\"> The Equation Is:</font><br> " +  aPrint + "(x " + x1Print + ") (x " + x2Print  + ")";
  } else {
    document.getElementById('testing').innerHTML = "<font color=\"red\"><b>YOUR INPUT PRODUCED AN ERROR:</b></font><br> You have entered a non-integer into one of the fields above, or the solution(s) for your equation is(are) an imaginary(s) number!";
  }
}

function SolveEq() {
  getValues();
  solveForX();
  factorEq();
}