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2x - 3y + 5 =0
3y = 2x - 5
y = 2/3 - 5/3
m1 = 2/3
- syarat suatu tegak lurus yaitu m1.m2 = -1
2/3 . m2 = -1
m2 = -1x 3/2 = -3/2
persamaan garis melalui titik (2, -3 ) dengan gradien m2 = -3/2
y- y1 = m2 (x-x1 )
y + 3 = -3/2 (x- 2)
2y + 6 = -3x+ 6
3x + 2y = 0
kita ubah seperti rumus di atas
2x - 3y + 5 = 0
-3y = -2x - 5
y = -2x - 5 / -3
y = 2 / 3 x - 5 / 3
jadi , m ( gradien ) = 2/3
y - y₁ = m ( x - x₁ )
x₁ = 2
y₁ = -3
y + 3 = 2 / 3 ( x - 2 )
y + 3 = 2/3x - 4/3
y = 2/3x - 4/3 - 3
y = 2/3x - 13/3
maaf kalau ada salah.......