bài 3 thực hiện phép tính sau:

m,\(\dfrac{4x-24}{5x+5}:\dfrac{x^2-36}{x^2+2x+1}\)

n,\(\dfrac{3x+21}{5x+5}:\dfrac{x^2-49}{x^2+2x+1}\)

p,\(\dfrac{3-3x}{\left(1+x\right)^2}:\dfrac{6x^2-6}{x+1}\)

q,\(\dfrac{4x^2-1}{x}:\left(1-2x\right)\)

r,\(\left(x^2+y^2\right):\dfrac{x^3y+xy^3}{x^4y}\)

s,\(\left(x+y\right):\dfrac{y^2+xy}{x-y}\)

bài 1 Chứng minh các đẳng thức sau:

a,\(\dfrac{x^2y+2xy^2+y^2}{2x^2+xy-y^2}=\dfrac{xy+y^2}{2x-y}\)

b,\(\dfrac{x^2+3xy+2y^2}{x^3+2x^2y+xy^2+2y^3}=\dfrac{1}{x-y}\)

exercise 15:look at the picture,answer the questions.Then practise asking questions in oral speech.

1.What's the festival?

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2.For whom is this festival?

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3.What are the children doing on the stage?

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4.What do they keep in their hands?

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5.When does Mid-autumn take place?

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6.What can children do on this day?

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exercise 17:combine the sentences using a subordinator to make a complex sentence.Number 1 is an example for you.

1.I'm going to the bank.I need some money.

I'm going to the bank because I need some money.

2.I made lunch.I got home.

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3.It's raining.She's going for a walk in the park.

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4.She finishes her homework soon ,she will fail the class.

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5.He decided to trust Tim.He was an honest man.

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6.We went to school.She decided to investigate the situation.

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7.Jennifer decided to leave Tom .He was too worried about his job.

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8.Dennis bought a new jacket.He had received one as a gift last week.

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9.Brandley claims that there will be trouble.He doesn't complete the job.

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10.Janice will have finished the report.The time you receive the letter.

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