[x-yquad 2x-x_(1)],[2x-yquad 3x+y_(1)],[x_(1)y_(2)])quad [=[[0,13]]],[quad " (xa "y_(1))" respectively,then "PQ=]

If [[xy, 2x-x_ (1) 2x-y, 3x + y_ (1)]] = [[- 1,50,13]]

If [[x-y,2x-x_1],[2x-y,3x+y_1]], =[[-1,5],[0,13]] and coordinats of points P and Q be (x,y) and (x_1,y_1) respectively then P,Q=?

If [[x-y,2x-x_1],[2x-y,3x+y_1]], =[[-1,5],[0,13]] and coordinats of points P and Q be (x,y) and (x_1,y_1) respectively then P,Q=?

If x_(1),x_(2),y_(1),y_(2)in R if ^(@)0

If the tangents and normals at the extremities of a focal chord of a parabola intersect at (x_(1),y_(1)) and (x_(2),y_(2)), respectively,then x_(1)=y^(2)( b) x_(1)=y_(1)y_(1)=y_(2)( d) x_(2)=y_(1)

[[x_(1),y_(1),1],[x_(2),y_(2),1],[x_(3),y_(3),1]] = 0 is the condition that the points (x_(i), y_(j)), i=1,2,3

If A(x_(1), y_(1)), B(x_(2), y_(2)) and C (x_(3), y_(3)) are the vertices of a Delta ABC and (x, y) be a point on the internal bisector of angle A, then prove that b|(x,y,1),(x_(1),y_(1),1),(x_(2),y_(2),1)|+c|(x,y,1),(x_(1),y_(1),1),(x_(3),y_(3),1)|=0 where, AC = b and AB = c.

If A(x_(1), y_(1)), B(x_(2), y_(2)) and C (x_(3), y_(3)) are the vertices of a Delta ABC and (x, y) be a point on the internal bisector of angle A, then prove that b|(x,y,1),(x_(1),y_(1),1),(x_(2),y_(2),1)|+c|(x,y,1),(x_(1),y_(1),1),(x_(3),y_(3),1)|=0 where, AC = b and AB = c.

If A(x_(1), y_(1)), B(x_(2), y_(2)) and C (x_(3), y_(3)) are the vertices of a Delta ABC and (x, y) be a point on the internal bisector of angle A, then prove that b|(x,y,1),(x_(1),y_(1),1),(x_(2),y_(2),1)|+c|(x,y,1),(x_(1),y_(1),1),(x_(3),y_(3),1)|=0 where, AC = b and AB = c.

An equilateral triangle has each side to a. If the coordinates of its vertices are (x_(1), y_(1)), (x_(2), y_(2)) and (x_(3), y_(3)) then the square of the determinat |(x_(1),y_(1),1),(x_(2),y_(2),1),(x_(3),y_(3),1)|^2 equals