varten # X ^ 2-6x + 8 = 0 # # 0 = x ^ 2-4x-2x + 8 # # 0 = x (x-4) -2 (x-4) # # 0 = (x-4) (x-2) # # (X-4) = 0 # TAI # (X-2) = 0 # # X = 4 # TAI # X = 2 # varten # x = 4 ja 2 # # X ^ 2-6x + 8 # on nolla Siten # 4 ja 2 # ovat sen tekijät
