Đề kiểm tra Toán 8 - Đại số - Bài: Ôn tập chương I - Đề 1

<span class='text_page_counter'>(1)</span>ĐIỂM. ĐỀ KIỂM TRA TOÁN 8 - ĐẠI SỐ Bài:. LỜI PHÊ. ÔN TẬP CHƯƠNG I - ĐỀ 1. Thời gian: 60 phút ĐỀ BÀI. .  3  Bài 1. Làm tính nhân:   x 2 y  4 x 3 y 2  5 xy 2  8  2 . . Bài 2. Rút gọn biểu thức: 3 x  53 x  5 4 x  1  25x  1 2. 2. Bài 3. Phân tích đa thức thành nhân tử: x 2  19 x  84 Bài 4. Phân tích đa thức thành nhân tử: x 2  7 xy  10 y 2. . . . Bài 5. Làm tính chia: x 4  3 x 3  4 x 2  x  3 : x 2  2 x  3 Bài 6. Tìm x, biết : x 3  3 x 2  3 x  1  0 Bài 7. Tìm giá trị nhỏ nhất của A  x 2  x  5 Bài 8. Tìm giá trị lớn nhất của B   x 2  7 x Bài 9. Chứng minh x 2  y 2  6 x  949  0 với mọi x, y. Bài 10. Xác định a và b sao cho x 3  4 x 2  ax  b chia hết cho x 2  x  2 ( Mỗi bài chiếm 1 điểm ) BÀI LÀM. ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... Lop8.net.

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