y = x^2 -9x +18 y= x^2 -9x+8

y = x^2-9x+18
y = (x-3)(x-6)
x1 = 3
x2 = 6

y = x^2-9x+8
y = (x-8)(x-1)
x1 = 8
x2 = 1

Maaf jika ada kesalahan :)