Point a (- 1, - 2), B (3,6), find point P (x, y) on the straight line L: 3x + 3y-10 = 0, so that the distance difference between point 1 P and point a, B is the largest Answer (- 101 / 6121 / 6) detailed process

Point a (- 1, - 2), B (3,6), find point P (x, y) on the straight line L: 3x + 3y-10 = 0, so that the distance difference between point 1 P and point a, B is the largest Answer (- 101 / 6121 / 6) detailed process

This is the problem of drinking horses. If we make a symmetrical point c about the line L, then the intersection point of the line BC and the known line is the obtained point P (it is proved that the difference between the two sides of the triangle is less than the third side)