Question : Find the area between the parabola $\displaystyle y^2 = 4ax$ and the line $\displaystyle y = mx$

Solution :

I tried to find the intersection of the two but dont know how the equation i am getting is

$\displaystyle (mx)^2 = 4ax$

$\displaystyle (mx)^2 - 4ax = 0$

I am stuck here!!!!!!!!!