Nancy wants to use her graphing calculator to solve the equation x^2 - 3x = 4. Which method will not provide a solution ?
A) Graph y = x^2 - 3x - 4 and find the x-intercepts.
B) Graph y = 4 + 3x - x^2 and find the x-intercepts.
C) Graph y = x^2 - 3x - 4 and find the x-coordinate of the vertex.
D) Graph y = x^2 - 3x and y = 4 and identify the x-coordinate of the point of intersection.