Đồ thị 2

m = 7.1 (slider from 5 to 10, step 0.1)
f(x) = (x + 2.0) / (x^(2.0) + 6.0 * x + m)
g(x) = x^(2.0) + 6.0 * x + m
A, B = Intersect(g, xAxis)
a = OrthogonalLine(A, xAxis)
b = OrthogonalLine(B, xAxis)