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m1= -
= -
syarat tegak lurus⇒ m1 . m2 = -1
-
persamaan garis (4,-2)
(y-y1) = m(x-x1)
y-(-2) =
y+2 =
y =
y =
*)untuk menhilangkan pecahan, dikali 3
jadinya,
3y = 5x - 26
3y-5x = -26
Cek, dimasukin titiknya
(3.-2) - (5.4) = -26
-6 - 20 = -26
-26 = -26 [benar]
semoga membantu