Đề kiểm tra 1 tiết môn Đại số Lớp 8 - Trường THCS Dực Yên

PGD HUYỆN ĐẦM HÀ
ĐỀ KIỂM TRA 1 TIẾT
TRƯỜNG THCS DỰC YÊN
NĂM HỌC 2010-2011
Môn: Đại số 8
Thời gian làm bài 45 phút.
(Không kể thời gian giao đề)
ĐỀ BÀI
A. TRẮC NGHIỆM:
Điền các đơn thức thích hợp vào ô trống:
1. (+ 3y)2 = x2 + 6xy +.
2. ( - )2 = x2 – 4x + 4.
3. (x – y)( +)=x2 – y2.
4. (3x + y)( -+) = 27x3 + y3.
B. TỰ LUẬN:
1. Viết bảy hằng đẳng thức.
2. Rút gọn biểu thức sau:
a) A = (x -3)(x + 3) – x2
b) B = (x + y)2+ 2(x – y)(x +y) + (x – y)2
3. Phân tích đa thức thành nhân tử:
a) x(x + y) + 5(x +y)
b) 9x2 - 6xy + y2
4. Tìm x biết rằng:
a) x2 – 2x = 0
b) x2 – 10x = - 25 
BÀI LÀM
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