(X2 – 7X -3) 34Y2 -7XY)

Bài 1 : Làm tính nhân:

a) 2x. (x

2

– 7x -3)

34

y

2

-7xy). 4xy

2

b) ( -2x

3

+

c) ( 25x

2

+ 10xy + 4y

2

). ( ( 5x – 2y)

d) ( 5x

3

– x

2

+ 2x – 3). ( 4x

2

– x + 2)