Bài 1:Phân tích đa thức thành nhân tử

a)x^4 +16 b)5x^2 -5y^2

c)x^4y^4 +4 D)2x^4 -32

Bài 3: Phân tích đa thức thành nhân tử

a)4x-4y+x^2-2xy+y^2 b)x^4 -4x^3 -8x^2 +8x

c)x^3 +x^2-4x-4 d)x^4-x^2+2x-1

e)x^4 +x^3 +x^2 +1 j)x^3-4x^2+4x-1

7.3x *(x+1)^2 -5x^3(x+1)+7(x+1)

8.(2x+1)^2-(x-1)^2

9.(x+5)^2-(x-7)^2

10.9 (x+5)^2-(x-7)^2

Cho tam giác ABC cân tại A trên tia đối của tia AC lấy điểm M, trên tia đối của AB lấy điểm N sao cho AM=AN. Chứng minh tứ giác BNCM là hình thang cân

Viết các đa thức sau dưới dạng tích

1,7xy^3-x^2y

2,121x+y^2-1

3.36x^2-144y^2

4.x^2 + 2x +1 - y^2

5.3(x+y)-a(x+y)^2

B12: Điền vào chỗ trống

1.(_______+_______) (9x^2-_________+1) = (____)^3 + (______)^3

2.(x+_______) (______-________+16) = (____)^3 + (______)^3

3.(_______+________) (25x^2 -10x +_____) =(_____)^3 + (______)^3

4.(_____+______) (_____-6x+9)=(_____)^3 +(______)^3

Viết các đa thức sau thành tích:

M=12xz -5xy

N=64^2-49

P=25y^2-16z^2

Q=4-25y^2

R=25x^2-10x+1

O=16-8y+y^2

X=1-6x+9x^2

Bài 1: Tính giá trị biểu thức

B=5x.(x-4y)-4y(y-5x) với x=-1/5 và y=-1/2

C+6xy(xy-y^2) -8x^2(x-y^2)+5y^2-xy+x^2 với {x=1/2;y=2

Bài 2: Rút gọn

A=x(2x^2-3)-x^2(5x+1)+x^2

B=3x(x-2)-5x(1-x)-8(x^2-3)

C=(x-y).(x^2.1)-(x+y).(x^2-1)

I.exercise: turn these sentenses into passive voice

1.People spend a lot of money on advertisement every day

2.People speak EL in almost every corner of the world

3.After class, one of the students always erases the chalk board

4.He believes her story

5.They use milk for making butter and cheese

6They are repairing this old bus station at the moment

7.Airplanes are carrying food and medicine to the flood region

8.Somebody is cleaning the room at the moment

9.They are not building the ring road round city

10.Son is not doing his homework now

11.The government have provided the victims with food ang clothing

12.I know that they told her of the meeting

13.Nobody has ever treated me with such kindness

14.Science and Technology have completely change human life

15.The boy broke the window

16.The man looked the woman with a red hat

17.Luckily for me, they didn't call my name

18.The teacher told the new pupil where to sit

19.A man I know told me about the place

Exercise 1: thành lập CĐK dựa vào các tình huống cụ thể sau:

1.Work harder or you will lose your job

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2.Pay attention to the teacher or you won't understand the lessons

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3.Go to bed early or you can't get up early the next morning

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4.Save money now or you will be in debt in the future

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5.Read more referent books if you want to win a place at university

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6.Driving more carefully or you will have an accident

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7.Brush your teeth often in order not to get toothache

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8.Ann felt asleep, so she couldn't understand the lesson yesterday

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9.The heavy rain prevented them from taking a trip to Cuc Phuong national park

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10.Andrew walked in the rain so he got a flu

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11.Mai ate to much meat, so he is overweight

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12.Listen carefully or you won't know what to do

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