mohon bantuannya soal matematika peminatan

2. gradien garis singgung (m) = 2x + 6, dititik (2,2).
m = 2(2)+6 = 10
pers : y-2 = 10(x-2)
y-2 = 10x - 20
y = 10x - 18

3. m = 3x^2 - 12x = 3 - 12 = -9
pers : y - 1= -9(x -1)
y = -9x+9+1 = -9x+10