Question

Find the coordinates of the pole of any given line Ax + By + C = 0

Answer 1

let's (X1, Y1) its pole .Then (1)must be the same as the polar of (x1,y1) i.e.
xx1/a square + yy1/b square - 1 =0 ....................(2)
Comparing 1and 2the required pole is easily seen to be

uppar answer. h☝️