Quy đồng

a) 3/6²yz và 5/4xy³

b) 3/x²-5x và 5/2x-10

c)5/2x+6 và 3/x²-9

d)2x/x²-8x+16 và x/3x²-12x

cho hình thang ABCD (AB//CD). Gọi EF là trung điểm AD,BC qua kẻ đường thẳng song song AD cắt CD tại G

a) DEFG là hình gì

b) kẻ AH là đường cao của hình thang ABCD

tính

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

rút gọn biểu thức

b) x(x-3)²-x(x+5)(x-2)

c) (x+1)(x-1)²-(x+2)(x²-2x+4)

Phân tích đa thức thành nhân tử

a) 5x²-5

b) x²-2x+2y-xy

c) x²-y²+2yz-z²

d)2y²-3y-5

e) x²-9x-10

f) x³+y³+z³-3xyz

Tính

a) (x+2)²-(x-1)²

b) (x-1)(x²+x+1)

c) (12x²y-25xy²+xy):3xy

d) (x³+3x²+3x+1):(x+1)

e) (x²-4y²):(x+2y)

phân tích đa thức thành nhân tử

a) 3x+3

b) 2a²-4a+2

c) (x²+1)²-4x²

d) x²-7x+6

e)3x²+2x-5

f)25x²-12x-13

Tìm x

a) x(x-1)-(x-2)²=1

b) (x+5)(x-3)-(x-2)²=-1

d) x²-x=10

e) (x+2)(x-3)-x-2=0

the correct form of to verb or V_ing

1 I pactise (make)____cookies twice a week

2 Nam promises (visit)_____Ha Noi next month

3 He promises (meet)_____her tomorrow?

4 He can't stand (tell)_____us funny stories

5 On the way to the office, he stopped (buy)____a newspaper

6 He forgot (turn on)____on all the lights before going out

7 Mai detests (get)____up early on Sundays

8 They are keen on (make)_____and (eat)____good food

the correct form of to verb or V_ing

1 I pactise (make)____cookies twice a week

2 Nam promises (visit)_____Ha Noi next month

3 He promises (meet)_____her tomorrow?

4 He can't stand (tell)_____us funny stories

5 On the way to the office, he stopped (buy)____a newspaper

6 He forgot (turn on)____on all the lights before going out

7 Mai detests (get)____up early on Sundays

8 They are keen on (make)_____and (eat)____good food

the correct form of to verb or v_ing

1 Nina spends (wail)______to school every day

2 I fancy (listen)____to music every night

3 They don't mind (visit)____us often

4 Will they resume (come)____tomorrow?

5 Don't worry, she suggests (come)___on time

6 Tom finishes (work)___every day

5. we enjoy doing gardening because it is very relaxing . 
- > We are keen .... 
- > We like ...... 
6. I like carving wood best because it makes me patient very 
- > I am hooked .........
- > My hobby ...........
- > I fancy ... ....
7. Ngoc hates sitting at the computer for too long . 
- > Ngoc dislikes ... 
- > Ngoc detests ..... 
- > Ngoc isn't......