Kiểm tra môn: Đại số 8 – Chương I

<span class='text_page_counter'>(1)</span>Họ và tên:…………………………………….. Điểm. MÔN: ĐẠI SỐ 8 – CHƯƠNG I. Lời phê của thầy (cô). Đề bài: Bài 1: Phát biểu quy tắc chia đa thức cho đơn thức. Bài 2: Rút gọn các biểu thức sau:. Áp dụng: Làm tính chia: (- 3x2y5 + 2x5y3 – 12xy) : 6xy. a) (x – 2)(2x +3) – 6x. b) (3x – 1)2 + 2(2x + 1)(3x – 1) + (2x + 1)2. Bài 3: Phân tích đa thức sau thành nhân tử: a) x2 – y2 – 5(x + y). b) x2 + y2 – z2 + 2xy. c) 8x3 – 1. d) 2x2 – 5x – 7. Bài 4: Làm phép chia: (x4 + 2x3 + 10x – 25) : (x2 + 5) Bài 5: Chứng minh rằng: x2 – 2x + 4 > 0 với mọi x. BÀI LÀM ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ......................................................................................................................................................................................... Lop8.net.

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