Let a (5, - 2) and B (7,3) be known in the triangle ABC, and let the midpoint m of AC be on the Y-axis and the midpoint n of BC be on the x-axis

Let a (5, - 2) and B (7,3) be known in the triangle ABC, and let the midpoint m of AC be on the Y-axis and the midpoint n of BC be on the x-axis

The midpoint of AC falls on the y-axis
Let C (x, y)
(x+5)/2=0,x=-5
The midpoint n of side BC is on the x-axis
(y+3)/2=0
y=-3
C(-5,-3)