If 2a+b+c=0 where a,b,c are the parameters,then the equation of a line belonging to both the family of lines ax+by+c=0 and bx+ay+c=0 is

D.E. of family of lines ax+by+c=0 is

For a gt b gt c gt 0 if the distance between (1,1) and the point of intersection of the lines ax + by +c=0 and bx + ay+c=0 is less than 2sqrt2 then

2a+b+2c=0(a,b,c in R), then the family of lines ax+by+c=0 is concurrent at

If a^2+b^2-c^2-2ab = 0 , then the family of straight lines ax + by + c = 0

Equations of the form ax+by=c and bx+ay=d where a!=b

If a,b,c are positive then both roots of the equation ax^(2)+bx+c=0