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5y = -2x -10
y = -2/5x -10/5
y = -2/5x -2
maka, m₁ = -2/5
m₁ . m₂ = -1
-25x . m₂ = -1
m₂ = -1 per -2/5
m₂ = 5/2
y -y₁ = m(x -x₁)
y -(-8) = 5/2((x -(-6))
y +8 = 5/2x +30/2
y +8 = 5/2x +15 dikali 2 untuk menghilangkan penyebut, sehingga
2y +16 = 5x +30
2y = 5x +30 -16
2y = 5x +16
Jadi, persamaannya adalah 2y = 5x +16.
Ini jawabannya.
m₂ = 5/2
y = m₂x - ( m₂x₁ - y₁ )
y = 5/2x - ( -15 + 8 )
y = 5/2x + 7
y = 5/2x + 14/2
2y = 5x + 14
5x - 2y + 14 = 0