അല്ലെങ്കിൽ I മൈനസ് ന്റെ ഉള്ളിൽ x 3 തിരഞ്ഞെടുക്കുക, രണ്ടാമത്തെ ഘട്ടത്തിൽ, x 1 x 2 സൃഷ്ടിച്ച ഐഡിയൽ I ൽ അടങ്ങിയിരിക്കുന്നു, കാരണം x 1 x 2 I ന്റെ ഘടകങ്ങളാണ്.
లేకపోతే I మైనస్ లోపల x3ని ఎంచుకోండి మరియు రెండవ స్టేజ్ లో, x1 x2 ద్వారా ఉత్పత్తి చేయబడిన ఐడియల్ Iలో ఉంటుంది, ఎందుకంటే x1 x2 I యొక్క ఎలిమెంట్స్ .