NOTE: This script function nominated for removal from the site index.

Returns a string of factors for any quadratic equation ($$ax^2+bx+c=0$$), where a = 1 and b and c are integers. If it cannot be factored with integer values only, the original quadratic is returned.

Returns a string of factors for any quadratic equation (ax^2+bx+c=0), where a = 1 and b and c are integers.
COPY/// @func   factor_quadratic(b, c)
///
/// @desc   Returns a string of factors for any quadratic equation (ax^2+bx+c=0),
///         where a = 1 and b and c are integers. If it cannot be factored
///         with integer values only, the original quadratic is returned.
///
/// @param  {real}      b           value for the coefficient of x
/// @param  {real}      c           value for the constant
///
/// @return {string}    string of factors
///

{
var bb = b;
var cc = c;
if (b < 0) { bb = -b; }
if (c < 0) { cc = -c; }
var brk = 0;
for (var a = -(max(bb, cc)); a <= max(bb, cc); a += 1) {
for (var t = -(max(bb, cc)); t <= max(bb, cc); t += 1) {
if (a * t == c && a + t == b) { brk = 1; break; }
}
if (brk == 1) { break; }
}
if (brk == 0) {
if (b == 0) { b = ""; }
else if (sign(b) > 0) { b = "+" + string(b); }
else { b = string(b); }
if (c == 0) { c = ""; }
else if (sign(c) > 0) { c = "+" + string(c); }
else { c = string(c); }
return "x^2" + b + "x" + c;
}
if (a == 0) { a = ""; }
else if (sign(a) > 0) { a = "+" + string(a); }
else { a = string(a); }
if (t == 0) { t = ""; }
else if (sign(t) > 0) { t = "+" + string(t); }
else { t = string(t); }
return "(x" + a + ")(x" + t + ")";
}


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