tolong dijawab ya, pake cara

Persamaan kurva...
.
d²y/dx² = y" = 3 - 4x  melalui (1,4) ejajar  2x + y + 7= 0
gradien gs 2x+y+ 7 = 0 ---> m = -2

m= y' = ∫ y" dx = ∫ 3-4x dx
m = 3x - 2x² + c
melalui (x,y)= 1,4 --> x = 1
m = 3(1) - 2(1)² + c = -2
3 - 2 + c = -2
1 + c= -2
c = -3
y' = 3x - 2x²  - 3

y =∫ y' dx = ∫ 3x - 2x² - 3
y= 3/2 x² - 2/3 x³ - 3x + c melalui (x,y) = (1,4)
4 = 3/2 (1)² - 2/3(1)³ - 3(1) + c
4 = 3/2 - 2/3 +3 +  c ...kalikan 6
24 = 9 - 4  +18 +  6c
24 = 23 + 6c
c = 1/6
persamaan  y = -2/3 x³ + 3/2 x² - 3x + 1/6
atau  y = 1/6 ( -4x³ + 9x² - 18 x + 1)