Tentukan persamaan garis singgung y= x^2 - 2x yang sejajar garis 3x -y +1

y'=0
2x-2=0
x=1
y=x²-2x
y=1-2=-1

m=3

y-y1=m(x-x1)
y+1=3(x-1)
y+1=3x-3
3x-y-4=0

y = x^2 - 2x
y' = 2x - 2
y' = 0 => 2x - 2 =0
2x = 2 => x = 1
x = 1 => y = x^2 - 2x
y = 1^2 - 2(1)
y = -1
3x - y + 1 = 0 => y = 3x + 1
m = 3
pers garis singung :
y - y1 = m(x - x1)
y + 1 = 3(x - 1)
y + 1 = 3x - 3
3x - y - 4