If `4a^2 + 9b^2 - c^2 + 12ab`=0 , then the family of straight lines ax + by + c =0 is concurrent at

If 3a + 2b + 6c = 0 the family of straight lines ax+by + c = 0 passes through a fixed point . Find the coordinates of fixed point .

If a gt 0, b gt 0 and c gt 0 , then both the roots of the equations ax^2 + bx + c =0

If a + b + c = 0 , then the equation equation : 3ax^(2) + 2bx + c = 0 has :

If the pair of lines x y-x-y+1=0 and the line a x+2 y-3=0 are concurrent then a=

If the pair of lines x y-x-y+1=0 and the line a x+2 y-3=0 are concurrent then a=

If b^(2) - 4ac gt 0, then find the nature of roots of quadratic equations ax^(2) + bx+ c =0

ax^(2) + 2hxy + by^(2) + 2 gx + 2fy + c=0 represents two parallel straight lines if

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

The lines 2 x+y-1=0, a x+3 y-3=0 and 3 x+2 y-2=0 are concurrent

The three lines a x+b y+c=0, b x+c y+a=0 and c x+a y+b=0 are concurrent only when