Refer:

Dear.....,(Tên bạn)

Thank you for the letter you sent me. How are you? How are your studies these days? My school has started summer vacation now. And I'm having an idea to invite you to a picnic with me this Sunday. Let's prepare some snacks so we can share food and chat with each other. Write to me soon. I hope you will agree

Best wishes, 

Love

Tên bạn

Cảm ơn nha

mind if I

mind if

\(g,\left(2x-5\right)^2-2\left(4x^2-25\right)=0\\ \Leftrightarrow\left(2x-5\right)^2-2\left(2x-5\right)\left(2x+5\right)=0\\ \Leftrightarrow\left(2x-5\right)^2-\left(2x-5\right)\left(4x+10\right)=0\\ \Leftrightarrow\left(2x-5\right)\left(2x-5-4x-10\right)=0\\ \Leftrightarrow\left(2x-5\right)\left(-2x-15\right)\\ \Leftrightarrow\left[{}\begin{matrix}x=\dfrac{5}{2}\\x=-\dfrac{15}{2}\end{matrix}\right.\)

\(h,\left(3-x\right)\left(4-x\right)=x^2-6x+9\\ \Leftrightarrow\left(3-x\right)\left(4-x\right)=\left(x-3\right)^2\\ \Leftrightarrow\left(3-x\right)\left(4-x\right)-\left(3-x\right)^2\\ \Leftrightarrow\left(3-x\right)\left(4-x-3+x\right)=0\\ \Leftrightarrow3-x=0\\ \Leftrightarrow x=3\\ i,x^3+x^2-20x=0\\ \Leftrightarrow x\left(x^2+x-20\right)=0\\ \Leftrightarrow x\left[\left(x^2+5x\right)-\left(4x+20\right)\right]=0\\ \Leftrightarrow x\left[x\left(x+5\right)-4\left(x+5\right)\right]=0\\ \Leftrightarrow x\left(x+5\right)\left(x-4\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}x=0\\x=-5\\x=4\end{matrix}\right.\)

\(k,2x^2-9x-5=0\\ \Leftrightarrow\left(2x^2+10x\right)-\left(x+5\right)=0\\ \Leftrightarrow2x\left(x+5\right)-\left(x+5\right)=0\\ \Leftrightarrow\left(x+5\right)\left(2x-1\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}x=-5\\x=\dfrac{1}{2}\end{matrix}\right.\)

as not to

xuất sắc a

victim

victim

5.Compost is a wonderful natural ______.                                                   

(1 Điểm)

fertilizer

product

chemical

6.Farmers collect household and garden waste to make ________.                

(1 Điểm)

compost

floor coverings

pipes

7.What is the best place ______ a compost heap?

(1 Điểm)

at

in

for

8.Can we use old car tires ______  shoes and sandals?                       

(1 Điểm)

make

to make

making

D

B

A

C

B

C

D

C

B

A