if the lines ax^2+2hxy+by^2=0 be two sides of a parallelogram and the line lx+my+n=0 be one of its diagonal , show that the eqn of the other diagonal is y(bl-hm)=x(am-hl)
if the lines ax^2+2hxy+by^2=0 be two sides of a parallelogram and the line lx+my+n=0 be one of its diagonal , show that the eqn of the other diagonal is y(bl-hm)=x(am-hl)