Kiểm tra 15 phút môn Đại Số

TRƯỜNG THCS TÂN ĐỒNG. KIỂM TRA 15 PHÚT . 
HỌ VÀ TÊN :  LỚP 7A MÔN . ĐẠI SỐ .
ĐIỂM
NHẬN XÉT CỦA GIÁO VIÊN
ĐỀ BÀI .
Câu 1. ( 7 điểm ) Cho hai đa thức : 
N(x) = x7 – 2x4 + 3x3 – 3x4 - x7 – x + 7 – 2x3 
M(x) = 3x2 – 4x4 – 3x2 – 5x5 – x – 2x2 – 3 
a/ Thu gọn các đa thức trên rồi sắp xếp theo lũy thừa giảm của biến .
b/ Tính N(x) + M(x) .
c/ Tính giá trị của N(x) + M(x) tại x = 1 .
Câu 2. ( 3 điểm ) Tìm nghiệm của đa thức : P(x) = 4x – 12 .
Bài làm :
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