鑻ユ柟绋?x2-1)(x2-4)=k鏈夊洓涓?潪闆跺疄鏍?涓斿畠浠?湪鏁拌酱涓婂?搴旂殑鍥涗釜鐐圭瓑璺濇帓鍒?姹俴鍊?