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a = 2
b = 3
gradien(m1)
=> m1 = -a/b
=> m1 = -2/3
karna tegak lurus, maka:
m1 x m2 = -1
-2/3 x m2 = -1
m2 = 3/2
(-3,-5) ----> (x1,y1)
persamaan garis:
y - y1 = m2(x - x1)
y -(-5) = 3/2 (x -(-3)
y + 5 = 3/2 (x + 3)
y + 5 = 3/2x + 9/2
y = 3/2x + 9/2 - 5 (samakan penyebut)
y = 3/2x + 9/2 - 10/2
y = 3/2x - 1/2 (kalikan 2 kedua ruasl
2y = 3x - 1
=> 3x - 2y - 1 = 0
"maaf kalau salah"