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m2 = -1
xy -2x² + 3x - 3 = 0
x dy + y dx - 4x dx + 3 dx = 0
x dy = (4x - y - 3) dx
dy/dx = (4x - y - 3)/x ; subtitusi dy/dx = m2 = -1
-1 = (4x - y - 3)/x
-x = 4x - y - 3
y = 5x - 3 subtitusi ke pers kurva untuk mendapat titik singgungnya
xy -2x² + 3x - 3 = 0
x(5x - 3) - 2x² + 3x - 3 = 0
5x² - 3x - 2x² + 3x - 3 = 0
3x² - 3 = 0
x² = 1
x = 1 atau x = -1
saat x= 1, maka y= 2
persamaan garis:
y-y1 = m2(x-x1)
y-2 = -1(x-1)
y = -x+3
saat x= -1, maka y= -8
persamaan garis:
y-y1 = m2(x-x1)
y+8 = -1(x+1)
y = -x-9