The equations `ax+by+c=0` and `dx+ey+f=0` represent the same straight line if and only if

The equations ax+by+c=0 and dx+ey+f=0 represent the same st. line if and only if :

The equation ax+by+c=0 represents a straight line

If 3x-by+2=0 and 9x+3y+a=0 represent the same straight line, find the values of a and b.

The equation ax + by + c =0 represents a straight line

The equation ax^(2)+by^(2)+cx+cy=0c!-=0 represents a pair of straight lines if

If the linear equations ax+by+c=0, (a,b,c!=0) and lx+my+n=0 represent the same line and r=l/a=n/c , write the values of r in the terms m and b.

If the equation ax^2+by^2+cx+cy=0 represents a pair of straight lines , then

If the equation ax^2+by^2+cx+cy=0 represents a pair of straight lines , then