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一、填空题（每小题３分，共３０分）（１）我们已学过的因式分解的四种基本方法是：①，②，③，④．（２）９ａ２－（ ）＝（３ａ＋２）（３ａ－２）（３）４ｘ２＋（ ）＋１＝（２ｘ－１）２（４）ｍ３＋８＝（ｍ＋２）（ ）（５）ａｘ２－ａ＝ａ（ ）（
First, fill in the blank (each small question 3 points, a total of 30 points) (1) We have learned the factorization of the four basic methods are: ①, ②, ③, ④. (2) 9a2- () = (3a + 2) (3a-2) 4x2 + (1 + 1 = (2x- 1) 2 (4) m3 + 8 = (m + 2) (