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Dengan,
m = gradien
Sehingga :
2x +3y = 6
3y = -2x +6
y = -2/3x +6/3
y = -2/3x +2
Maka, m₁ = -2/3
m₁ . m₂ = -1
-2/3 . m₂ = -1
m₂ = -1 per -2/3
m₂ = 3/2
y -y₁ = m(x -x₁)
y -2 = 3/2(x -(-4))
y -2 = 3/2x +12/2 dikali 2 untuk menghilangkan penyebut, sehingga
2y -4 = 3x +12
2y = 3x +12 +4
2y = 3x +16
3x -2y +16 = 0
Jadi, persamaannya adalah 3x -2y +16 = 0.
Itu jawabannya.