the tangents to the parabola y2 =4ax at p(at2,2at) and q(at22,2at2) intersect at r. what is the area of the triangle PQR ?

find the intersection pt as at1t2,a(t1+t2)

and apply area of triangle formula

They will intersct at point = {a(t + t2), att2)

now u can find th area using determinant fom!

plz approve! 

5at2