de kiem tra dai so 9 15 phut lan 1 38486
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Họ và tờn: ...........................................................................
Lớp 8B.....
Kiểm tra 15’ - bài số 1
Điểm
Bài 1: Phân tích các đa thức sau thành nhân tử.
a/ 14x + 14y = ............................................................................................................................
b/ 7x(x + 1) – 7(x + 1) =...............................................................................................................
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c/ 3x – 3y – ay + ax =...................................................................................................................
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Bài 2 : Thực hiện phộp tớnh :
a/ (-5x3)(2x2 + 3x - 5) = ................................................................................................................
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b/ 20a2b2c3 : 5ab2c = .....................................................................................................................
c/ ( xy3 + 2x2y2 +
1 3
x y ) : 5xy =...................................................................................................
2
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d/ (3x2 – 12 ) : (x – 2) =................................................................................................................
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