If `ax^(2)+6xy+3y^(2)-10x+10y-6=0` represents a pair of perpendicular lines, then `|a|=`

If a x^(2)+6 x y+b y^(2)-10 x+10 y-6=0 represents a pair of perpendicular lines, then |a|=

If the equation px^(2)-8xy+3y^(2)+14x+2y+q=0 represents a pair of perpendicular lines, then

If the equation px^(2)-8xy+3y^(2)+14x+2y+q=0 represents a pair of perpendicular lines, then

If the equation a x^(2)+5 x y-6 y^(2)-10 x+11 y+c=0 , represents two perpendicular lines then c=

Show that 2x^(2)+3xy-2y^(2)+3x+y+1=0 represents a pair of perpendicular lines.

If the equation k^(2)x^(2)+10xy+3y^(2)-15x-21y+18=0 represents a pair of mutually perpendicular lines then

If 2x^(2)+xy-3y^(2)+4x+ky-6=0 represents a pair of lines then k=

The equation ax^(2)+3xy-3y^(2)=0 reprougents a pair of perpendicular lines through origin then a equals

Prove that the equation 2x^(2)+3xy-2y^(2)-x+3y-1=0 represents a pair of perpendicular straight lines.