nilai max dari 2y =x(6-x)

jawab

2y = x(6 - x)
2y = 6x - x²
y =  - 1/2 x²  + 3x
a = -1/2
b = 3
c = 0
nilai maks  = y =  D/-4a
D = b² - 4ac
D = 9

y = 9/(-4)(-1/2)
y = 9/2
y = 4 ¹/₂