Trờng THCS Hải Tây
Họ và tên :.......................................
Lớp : 9.....................................
Chữ ký PHHS :..............................
Kiểm tra: Đại số 9
Thời gian: 15phút
Bài số :.......
Ngày .......tháng năm 2008
Đề 1:
Giải các phơng trình:
a) 5x
2
+ x + 2 = 0 b) 7x
2
+ 9x 2
=0
c) 4x + 4x
2
+ 1 = 0
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