Let a and b are non-zero real numbers.Then the equation `(ax^(2)+by^(2)+c)(x^(2)-5xy+6y^(2))=0` represents
(A) two straight lines and a circle when a=b and `a>0,c<0`
(B) two straight lines and a circle when `a!=b`
(C) two straight lines and a circle when a=b and a<0,c>0
(D) four straight lines when c=0 and a>0,b>0

a(x^(2)-y^(2))+xy=0 represents a pair of straight lines for

Let aa n db be nonzero real numbers. Then the equation (a x^2+b y^2+c)(x^2-5x y+6y^2)=0 represents. four straight lines, when c=0 and a , b are of the same sign. two straight lines and a circle, when a=b and c is of sign opposite to that a two straight lines and a hyperbola, when aa n db are of the same sign and c is of sign opposite to that of a a circle and an ellipse, when aa n db are of the same sign and c is of sign opposite to that of a

The condition that the equation ax^(2)+by^(2)+c(x+y)=0 to represents a pair of straight lines is

The equation x^(2)y^(2)-9y^(2)-6x^(2)y+54y=0 represents (a)a pair of straight lines and a circle (b)a pair of straight lines and a parabola (c)a set tof four straight lines forming a square (d)none of these

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

The equation 3ax^2+9xy+(a^2-2)y^2=0 represents two perpendicular straight lines for

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

The equation sqrt(x^2 + 4y^2 - 4xy+4) +x-2y=1 represent a (A) straight line (B) circle (C) parabola (D) pair of lines

Two straight lines x-3y-2=0 and 2x-6y-6=0

The equation x^(2)+y^(2)+2x-4y+5=0 represents a.a point b.a pair of straight lines c.a circle of non zero radius d.none of these