Pro # 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 # NEBO # (x-2) = 0 # # x = 4 # NEBO # x = 2 # Pro # x = 4 a 2 # # x ^ 2-6x + 8 # je nula Proto # 4 a 2 # jsou jeho faktory
