Question

Find the single equation of the straight lines passing through the origin and orthogonal to the lines represented by the following equations.
(a) 3x²+8xy + 4y²=0
(b) 2x²-5xy-3y²-x+3y=0
(c)8x²-14xy+3y² = 0
(d) x²-y²+2y-1=0​