jika x = 4 + 2 y,hasil s(y2 - 2y) dx adalah

x = 4 + 2y
2y = x - 4
y = 1/2 (x - 4)
y²  = { 1/2(x - 4) }²
y²  = 1/4 (x² -8x + 16)
y²  = 1/4 x² - 2x + 4

∫ (y² - 2y) dx =
∫ 1/4 x² - 2x + 4 - (x - 4) dx
∫ (1/4 x² -2x + 4 - x + 4 ) dx
∫ (1/4 x² - 3x + 8) dx
= 1/4 (1/3)  x³ - 3/2 x² + 8x + c
= 1/12 x³ - 3/2 x² + 8x + c
= 1/12 (x³ - 18 x² + 96 x ) + c