Find p and q, if the following equation represent a pair of lines perpendicular to each other :
(1) `px^(2) - 8xy + 3y^(2) + 14x + 2y + q = 5`
(2) `12x^(2) + 7xy - py^(2) + 18x + qy + 6 = 0.`

Find p and q, if the following equation represents a pair of perpendicular lines 6x^(2)+5xy-py^(2)+7x+qy-5=0 .

Find P and k if the equation px^(2)-8xy+3y^(2)+14x+2y+k=0 represents a pair of perpendicular lines.

Find the combined equation of the pair of lines through the origin and perpendicular to the lines represented by : (1) 5x^(2) - 8xy + 3y^(2) = 0 (2) x^(2) + 4xy - 5y^(2) = 0 (3) ax^(2) + 2hxy + by^(2) = 0 .

If the equation 12x^(2)+7xy-py^(2)-18x+qy+6=0 represents a pair of perpendicular lines then

If the equation px^(2)-8xy+3y^(2)+14x+2y+q=0 represents a pair of perpendicular lines, then

If the equation px^(2)-8xy+3y^(2)+14x+2y+q=0 represents a pair of perpendicular lines, then