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= 2/1
= 2
persamaan garis:
y-2 = 2 (x-4)
y-2 = 2x-8
y = 2x - 6
x2-x1
tegaklurus = m1.m2=-1 = m2= -1/2
y-2 = -1/2 (x-4)
y-2 = -1/2x + 2 ----> x2
2y-4= -x+4
x+2y-8 = 0
Semoga membantu ;; :D