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m1 = m2
5x - 12 y + 9 = 0
m= -x / y
m = - 5 / -12
m = 5/12
maka m2 = 5/12
persamaan garis melakui (-2 , 1) dgn gradien 5/12
y - y1 = m ( x - x1)
y - 1. = 5/12 ( x + 2)
---------------------------- x 12
12y - 12 = 5 ( x + 2)
12 y - 12 = 5x + 10
12 y - 5x = 10 +12
12 y - 5x = 22
m = 5/12
maka m2 = 5/12
y - y1 = m ( x - x1)
y - 1. = 5/12 ( x + 2) kalikan 12
12y - 12 = 5 ( x + 2)
12 y - 12 = 5x + 10
12 y - 5x = 10 +12
12 y - 5x = 22
12y -5x -22 = 0