tolong gan ane gk bsa jawab

grafik memotong sb x di (1/2 0).dan (3, 0)
y = a (x - 1/2)(x -3) dan melalui (0, 3)
3 = a (0-1/2)(0-3)
3 = a (3/2)
a = 2
maka f (x) = 2(x -1/2)(x -3)
f (x) = 2x^2 -6x +3