Bernstein = function (n, i)
{
    return Factorial(n) / Factorial(i) / Factorial(n - i);
}
Calculates the Bernstein basis from the three factorial coefficients.

@function Phaser.Math.Bernstein
@since 3.0.0

@param {number} n - The first value.
@param {number} i - The second value.

@return {number} The Bernstein basis of Factorial(n) / Factorial(i) / Factorial(n - i)