Straight Line a...

The pair of straight lines passing through the point (1, 2) and perpendicular to the pair of straight lines 3x² – 8xy + 5y² = 0, is

If in general quadratic equation f(x, y) = 0, ∆ = 0 and h² = ab, then the equation represents

The condition of representing the coincident lines by the general quadratic equation f(x,y) = 0, is

The joint equation of the straight lines x + y = 1 and x – y = 4, is

The equation to the pair of straight lines through the origin which are perpendicular to the lines 2x² – 5xy + y² = 0, is

The area of the triangle formed by the lines x² – 4y² = 0 and x = a, is

The value of λ, for which the equation x² – y² – x – λy – 2 = 0 represents a pair of straight lines, are

If the lines represented by the equation ax² – bxy – y² = 0 make angles α and β with the x-axis, then tan (α + β )

The angle between the lines represented by the equation 4x² – 24xy + 11y² = 0 are