tolong bantu jawab pleaseee

Turunan

y = x (16 - 2x)(6 - 2x)
y = x(2)(8-x)(2)(3- x)
y = 4x (8 -x )(3 - x)
y = 4x (24- 11x + x²)
y = 96x - 44 x² + 4x³

y' = 12x² - 88x + 96
y'= 0
12 x² - 88x + 96 = 0
3x² - 22 x + 24= 0
(3x - 4)(x - 6) = 0
x = 4/3   atau x = 6