persamaan garis singgung kurva y. =x² - 3x sejajar dengan 2y + 4x - 6 =0

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y = x² - 3x
m1= dy/dx = 2x - 3
sejajar  2y + 4x - 6  =0
m2 = -4/2 = -2
sejajar m1= m2
2x - 3 = - 2
2x = -2 + 3 = 1
x = 1/2
y = x² - 3x = (1/2)² - 3(1/2)
y = 1/4 - 3/2
y = - 5/4
garis singgung di (1/2, -5/4) , m = -2
y-y1 =m(x-x1)
y+5/4 = -2(x-1/2)
y + 5/4 = -2x+1
y = - 2x + 1 - 5/4
y = -2x - 1/4