ynomial_xs[1].toFixed(2)+"<sup>2</sup>a + "+polynomial_xs[1].toFixed(2)+" b + c = "+polynomial_ys[1].toFixed(2);
    polynomial_system.innerHTML += "<br>";
    polynomial_system.innerHTML += "P(x<sub>3</sub>) = "+polynomial_xs[2].toFixed(2)+"<sup>2</sup>a + "+polynomial_xs[2].toFixed(2)+" b + c = "+polynomial_ys[2].toFixed(2);
    polynomial_formula = document.getElementById("polynomial_formula");
    polynomial_formula.innerHTML = "a = " + X[2].toFixed(2) + ", b = " + X[1].toFixed(2) + ", c = " + X[0].toFi