given the graph of a quadratic function f(x) = mx²+6x+k intersects the x-axis at two distinct point while the x-axis is the tangent to the graph points while the x-axis is the tangent to the graph of a quadratic function f(x) = (kx)²-4nx+9, where k, m and n are constants. Express the range of values of n in terms of m.
i've got my answer but I'm not sure about it
