why you cần help

a) \(3x^2-3xy-2x+2y\)

\(=3x\left(x-y\right)-2\left(x-y\right)\)

\(=\left(3x-2\right)\left(x-y\right)\)

b) \(6x^2+3xy-2ax-ay\)

\(=3x\left(2x+y\right)-a\left(2x+y\right)\)

\(=\left(3x-a\right)\left(2x+y\right)\)

c) \(x^3-6x^2+9x\)

\(=x\left(x^2-6x+9\right)\)

\(=x\left(x-3\right)^2\)

I

1. look

2. is looking

3. tastes

4. doesn't own

5. am wearing

6. seems

7. are doing

8. thinks

9. is coming

10. isn't talking

II.

1. was/worked

2. played

3. were/doing

4. went

5. was driving

6. Did/go

7. wasn't calling

8. was still sleeping

9. rang/was taking

10. was reading/was listening/was doing

11. crossed/saw

12. was having/arrived

PLEASE GIÚP MÌNH

khó quá

KHÓ ĐỌC QUÁ

Trả lời :

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Hướng dẫn thoai , bìa này tư duy đc :))

a) các cặp song song là : QE//PH;PQ//FH

b)

Góc EOQ = 90^o - góc OQE = 90^o- 55^o = 35^o

Góc OFH = 90^o - góc EOQ = 90^o - 35^o = 55^o

Góc PHF = 90^o - góc OFH = 90^o - 55^o = 35^o