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Print - Amazing Quadratic Equation Solver - JavaScriptBank.com

Full version: jsB@nk » Calculation » Math » Amazing Quadratic Equation Solver
URL: http://www.javascriptbank.com/amazing-quadratic-equation-solver.html

Amazing Quadratic Equation Solver © JavaScriptBank.comThis JavaScript will factor and solve for both values of X, any quadratic equation that has real number solutions.

Full version: jsB@nk » Calculation » Math » Amazing Quadratic Equation Solver
URL: http://www.javascriptbank.com/amazing-quadratic-equation-solver.html



JavaScript
<script language="javascript">// Created by: Ben Kanaev :: http://www.webhostreview.bizvar 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();}</script><!--    This script downloaded from www.JavaScriptBank.com    Come to view and download over 2000+ free javascript at www.JavaScriptBank.com-->


HTML
<form name="form">  <input type="text" name="x2Coef" size="2" value="1"><b> X<sup>2</sup> </b>    <select name="firstSign">      <option value="+">+</option>      <option value="-">-</option>    </select>  <input typle="text" name="xCoef" size="2" value="1"><b> X</b>    <select name="secondSign">      <option value="+">+</option>      <option value="-">-</option>    </select>   <input type="text" name="endValue" size="2"><br>  Round to the nearest thousandths?<input type="checkbox" name="round">Yes<br><br>  <input type="button" value="Solve!" onClick="SolveEq()"></form><p id="testing" style="width: 400px; height: 100px; border-width: 2px; border-style: groove; border-color: orange; font-size: 16px; color: blue; vertical-align: center">The Solution Will Appear Here!</p><!--    This script downloaded from www.JavaScriptBank.com    Come to view and download over 2000+ free javascript at www.JavaScriptBank.com-->