19.因式分解(x-9)2-5x+45＝？(A)(x - 9)(x -14)(B)(x + 9)(x +14)(C)(x -1)(x - 2)(D)(x +1)(x + 2)

問題詳情

19.因式分解(x-9)2-5x+45＝？
(A)(x - 9)(x -14)
(B)(x + 9)(x +14)
(C)(x -1)(x - 2)
(D)(x +1)(x + 2)

參考答案