Họ tên:…………………………..

Lớp:.....................                                KIỂM TRA

Môn : Toán. Thời gian:15 phút.

        Điểm

 

 

 

         Lời phê của cô giáo

Nhận xét của phụ huynh

Bài 1: ( 1,5 điểm) Tính nhanh:

          a) 8922 + 892 . 216 + 1082                            b) 362 + 262 – 52 . 36

Bài 2: ( 3 điểm) Tính:

       a) x (x2  + 4x – 3) –(2 x + 1)(2x – 5)               b) (2x - 3)(3 + 2x) + (x – 2)3

       c) (9x2 + 6x + 1) : (1 + 3x)                               d) (2x- 5x2 + 6x - 15) : (2x - 5)

Bài 3( 3,5 điểm): Phân tích đa thức thành nhân tử:

a)  2x3y – 8x2y + 8xy                                           b) 4x2 + 8xy – 3x – 6y

            c) x2 – 4xy + 4y2 – 9                                           d) x2 + x – 12

Bài 4: ( 1,5 điểm) Tìm x, biết:

a) (3x – 1)( 2x + 3) – 6x(x – 3) = 0                      b) ( x + 2)(3x – 1) = ( x + 2)(5x + 2)

Bài 5 ( 0,5 điểm): Chứng minh biểu thức sau luôn dương với mọi giá trị của biến x và y

A = x2 – 6xy + 2+ 2x – 6y  + 9y2


Họ tên:…………………………..

Lớp:.....................                                KIỂM TRA

Môn : Toán. Thời gian:15 phút.

        Điểm

 

 

 

         Lời phê của cô giáo

Nhận xét của phụ huynh

Bài 1: ( 1,5 điểm) Tính nhanh:

          a) 8922 + 892 . 216 + 1082                            b) 362 + 262 – 52 . 36

Bài 2: ( 3 điểm) Tính:

       a) x (x2  + 4x – 3) –(2 x + 1)(2x – 5)               b) (2x - 3)(3 + 2x) + (x – 2)3

       c) (9x2 + 6x + 1) : (1 + 3x)                               d) (2x- 5x2 + 6x - 15) : (2x - 5)

Bài 3( 3,5 điểm): Phân tích đa thức thành nhân tử:

a)  2x3y – 8x2y + 8xy                                           b) 4x2 + 8xy – 3x – 6y

            c) x2 – 4xy + 4y2 – 9                                           d) x2 + x – 12

Bài 4: ( 1,5 điểm) Tìm x, biết:

a) (3x – 1)( 2x + 3) – 6x(x – 3) = 0                      b) ( x + 2)(3x – 1) = ( x + 2)(5x + 2)

Bài 5 ( 0,5 điểm): Chứng minh biểu thức sau luôn dương với mọi giá trị của biến x và y

A = x2 – 6xy + 2+ 2x – 6y  + 9y2


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nguon VI OLET