By translating the axes the equation `xy - 2x - 3y - 4 = 0` has changed to `XY=k,` then `k=`

By translating the axes the equation xy-x+2y=6 has changed to xy=c, then c =

By translation of axes the equation xy - x + 2y - 6 = 0 changed as xy = c then c =

By translation of axes the equation xy-x+2y-6=0 changed as XY=c then c=

Verify the differential equation y = Ax : xy' = y (x ne 0)

If the equation kx^(2) – 2xy - y^(2)– 2x + 2y = 0 represents a pair of lines, then k =

If the equation x^(2)+3xy+2y^(2)+x-y+k=0 represents a pair of line, then k=

The point to which the axes to be translated to eliminate x and y terms in the equation 3x^(2) - 4xy - 2y^(2)-3x -2y-1=0 is