Question

3.
I S= x2 + y2 + 2gx+2fy+c= 0 represents a circle then show that the straight line lx+my+n=0 which
touches the circle S = 0 if g^2 +f^2 - c=​

Answer 1

Answer:

x+teb-_++-_+gei+_tdirk&_(7(_,-_(_dhejeuei