De kiem tra chuong 1 dai so 8
Chia sẻ bởi Lê Anh Khôi |
Ngày 12/10/2018 |
83
Chia sẻ tài liệu: De kiem tra chuong 1 dai so 8 thuộc Đại số 8
Nội dung tài liệu:
Trường THCS Đông Minh Bài kiểm tra số 1
Năm học: 2017 – 2018 Môn : Đại số- Tiết 21
Họ và tên:...............................................................Lớp : 8......
Điểm
Lời phê của thầy(cô) giáo
Đề bài:
Bài 1(2 điểm): Viết 7 hằng đẳng thức đáng nhớ.
Bài 2 (3 điểm): Thực hiện phép tính
a, (2x + 1)(3x + 1)
b, (3x3 + 4x2 – 1): (3x + 1)
c, (a + 1)(a2 – a + 1) + (a – 1)(a + 1)
d, (x +2)(x2- 2x + 4) – (x3 + 5)
Bài 3(3 điểm): Phân tích đa thức thành nhân tử
a, x2 + x
b, a2b + 2ab +b
c, 4x2 – 4xy – 8y2
Bài 4( 1 điểm): Tìm x, biết:
(3x3 + x2 – 13x + 5):(x2 + 2x – 1) = 10
Bài 5( 1 điểm): Chứng minh rằng với mọi số tự nhiên lẻ n thì n3 – n luôn chia hết cho 24.
Bài làm
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Năm học: 2017 – 2018 Môn : Đại số- Tiết 21
Họ và tên:...............................................................Lớp : 8......
Điểm
Lời phê của thầy(cô) giáo
Đề bài:
Bài 1(2 điểm): Viết 7 hằng đẳng thức đáng nhớ.
Bài 2 (3 điểm): Thực hiện phép tính
a, (2x + 1)(3x + 1)
b, (3x3 + 4x2 – 1): (3x + 1)
c, (a + 1)(a2 – a + 1) + (a – 1)(a + 1)
d, (x +2)(x2- 2x + 4) – (x3 + 5)
Bài 3(3 điểm): Phân tích đa thức thành nhân tử
a, x2 + x
b, a2b + 2ab +b
c, 4x2 – 4xy – 8y2
Bài 4( 1 điểm): Tìm x, biết:
(3x3 + x2 – 13x + 5):(x2 + 2x – 1) = 10
Bài 5( 1 điểm): Chứng minh rằng với mọi số tự nhiên lẻ n thì n3 – n luôn chia hết cho 24.
Bài làm
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