bk2 p41 q48

question : given the curve C: and P(h,k) is a point on C , where h and k are non-zero no.

(a)find the equation of the tangent to C at P

(b) if the tangent found in (a) intersects C again at Q , find the coordinates of Q.

my working:

equ.

sub to C

don't know how to solve and find Q

thanks!