[" 28.If "x^(2)-y^(2)=0,quad |x+2y=1" form an isosceles "],[" triangle then "l=],[[" 1) "1," 2) "2," 3) "3," 4) "0]]

If x^(2)-y^(2)=0, l x+2y=1 form an isosceless triangle then l=

If x^(2)-y^(2)=0,lx+2y=1 form an isosceles triangle then l is

If the lines 3x^(2)-kxy-3y^(2)=0 and x+2y=8 form and isosceles triangle then: k=

If the lines 2x-y=8,x-2y=17 and line L=0 form an isoceles triangle,then slope of line L can be

The lines (a+b)x + (a-b) y-2ab=0, (a-b)x+(a+b)y-2ab = 0 and x+y=0 form an isosceles triangle whose vertical angle is

. The lines (a+b)x + (a-b) y-2ab=0, (a-b)x+(a+b)y-2ab = 0 and x+y=0 form an isosceles triangle whose vertical angle is

. The lines (a+b)x + (a-b) y-2ab=0, (a-b)x+(a+b)y-2ab = 0 and x+y=0 form an isosceles triangle whose vertical angle is

. The lines (a+b)x + (a-b) y-2ab=0, (a-b)x+(a+b)y-2ab = 0 and x+y=0 form an isosceles triangle whose vertical angle is