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anha.010304
2 năm trước
bài 1 d) (x – 2)^ 3 + (3x – 1)(3x + 1) = (x + 1) ^3 f) (x – 1) ^3 – x(x + 1) ^2 = 5x(2 – x) – 11(x + 2) Câu 9: Cho hình vuông ABCD, AB = 6cm. Trên tia đối của tia AD lấy điểm I sao cho AI = 2cm, IC cắt AB tại E. Độ dài các đoạn thẳng IC và IE là: A. IC = 8cm; IE = 1,5cm B. IC = 9cm; IE = 3cm C. IC = 10cm; IE = 2,5cm D. IC = 10cm; IE = 3,5cm.
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