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p = 2
b = 5
a = -2
ax + by + c = 0
m = -a/b
4x +2y -5 = 0
m1 = -4/2 = -2
// m1 = m2
persamaan.
y - b = m(x -a) + p/m
y -5 = -2(x -(-2)) + 2/-2
y -5 = -2x -4 -1
2x +y = 0
maap klo salah