3(a-b)=-(a-b)y=2ab*(a+b)x-(a-b)y=ab

Solve by cross multiplication: (a-b)x+(a+b)y=2a-b(a-b)x-(a+b)y=ab

Solve the following pair of linear equations by cross multiplication method : (a+c)x-(a-c)y=2ab , (a+b)x-(a-b)y=2ab .

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

Find the angle between the st. Lines : (a+b)x+(a-b)y=2ab and (a-b)x+(a+b)y=2ab

Find the angle between the st. Lines : (a+b)x+(a-b)y=2ab and (a-b)x+(a+b)y=2ab is ......................

Show that the lines (a+b)x+(a-b)y-2ab=0,(a-b)x+(a+b)y-2ab=0andx+y=0 form an isosceles triangle whose vertical angle is 2tan^(-1)((a)/(b)) .

Prove that the angle between the st. lines : (a + b)x + (a-b)y = 2ab and (a-b)x+(a+ b) y = 2ab is tan^-1 frac(2ab)(a^2-b^2) .

Triangle formed by variable lines (a+b)x+(a-b)y-2ab=0 and (a-b)x+(a+b)y-2ab=0 and x+y=0 is (where a, b in R )