The image of the point (-8,12) with respect to the line mirror 4x+7y+13=0 is (a) (16,-2) (b) (-16,2) (c) (16,2) (d) (-16,-2)
Answer is option d. (-16,-2)
Explanation:-
Prove that the product of the perpendicular drawn from the point (x1,y1) on the lines represented by ax2+2hxy+by2=0 is (ax12+2hx1y1+by12)/(√{(a-b)2+4h2}.