Phân tích đa thức sau thành nhân tử

9y^3-y

8y^3-2y(1-2y)^2

2x^3-8x^2+8x

2x^4-6x^3+6x^2-2x

x^3-6x^2y+9xy^2-x

5x^4-15x^3y+15x^2y^2-5xy^3-5x

3x^2+3xy-x-y

6xy-x^2-y^2+25

7m-7n-m^2+2mn-n^2

3xy-3xz+2xyz-xy^2-xz^2

Complete the sentences with tag questions

Example: You like that band,don't you?

1)They enjoy school,.....?

2)You think your English is good enough,.....?

3) The sun rises in the east,.....?

4) Nga invited Hoa to the movies,.....?

5)Hoa arranged the time,....?

6)Bao can play chess,....?

7)They'll go to the pop concert,....?

8)Alexander Bell was born in Edinburgh,the capital of Scotland,......?

9)You are fond of action movies,.....?

Tìm x biết rằng

a)x(x-3)+2x-6=0

b)x^2+7x-2(x+7)=0

c)x^2(x-3)-15+5x=0

Phân tích đa thức sau thành nhân tử

a)2y^3-3y^2+2y-3

b)2ab+3c+6b+ac

c)25-x^2+4xy-4y^2

d)a^3+3a^2b+3ab^2+b^3-7a-7b

e)a^3-a+b^3-b

g)x^4+x^3+x+1