11is it so???
bt i m getting the answer as -1.
i simply found out the equns. for the tanget and normal..
simultaneously solved it with the line given... got the co-ordinates of A and B...
found out the slope of AO and BO... where O is the vertex i.e, (0,0)
and equatd their product with -1 (as they are perp.)
i m getting this,
(1-2l)(2l+3)=-1
solving the quadritic i got the sum of the roots as -1. :(
pls check...