The equation `x^3+x^2y-x y^2=y^3` represents (a)three real straight lines (b)lines in which two of them are perpendicular to each other (c)lines in which two of them are coincident (d)none of these

If the equation 4y^(3) - 8a^(2)yx^(2) - 3ay^(2)x +8x^(3) = 0 represents three straight lines, two of them are perpendicular, then sum of all possible values of a is equal to

The straight lines X axis and Y axis are perpendicular to each other . Is the condition m_1m_2=-1 true ?

Find the value of p if lines 3y - 2x = 4 and 4y - px = 2 are perpendicular to each other .

Find the number of straight lines perpendicular to the line 2x-3y+6=0.

If the two straight lines x+(2k-7)y+3=0 " and " 3kx+9y-5=0 are perpendicular then the value of k is

The equation a^2x^2+2h(a+b)x y+b^2y^2=0 and a x^2+2h x y+b y^2=0 represent (a)two pairs of perpendicular straight lines (b)two pairs of parallel straight lines (c)two pairs of straight lines which are equally inclined to each other (d)none of these

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

Find the equations of straight lines which are perpendicular to the line 3x+4y-6=0 and are at a distance of 4 units from (2,1).