ตอบ:
คำอธิบาย:
# f (x) = 4x ^ 2 (x-2) -12x (x-2) 8 (x-2) + 0 #
#COLOR (สีขาว) (f (x)) = (x-2) (4x ^ 2-12x + 8) #
#COLOR (สีขาว) (f (x)) = 4 (x-2) (x ^ 2-3x + 2) #
#COLOR (สีขาว) (f (x)) = 4 (x-2) (x-2) (x-1) #
#COLOR (สีขาว) (f (x)) = 4 (x-2) ^ 2 (x-1) #
# rArr4 (x-2) ^ 2 (x-1) = 0 #
#rArr "รากคือ" #
# x = 2 "multiplicity 2 และ" x = 1 "multiplicity 1" #