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1. both cloth clothes road
2. prize fight litter bike
3. town snow show bowl
4. lift fit k lion
5. symbol cycle physics gym
6. old stone hope come
1.Although she wants to protect the environment, she uses motorbike instead of walking when travelling short distances.
2.The kids love seeing cartoons.However, their mother doesn't let them do so.
3.They saved a large amount of money on electricity bills.Because they used energy-saving bulbs.
Traveling to my new company is farther than traveling to the old one.
Mọi người giúp mình với, mình đang cần gấp, xin cảm ơn ạ
III/ chọn từ thích hợp
Clothes can tell a lot (about /at/on/with) a person. Some people like very colourful clothes because they want everyone (look/ looked / to look/ looking) at thrm and they want to be the center og things. (Each other / others / another / other) people like to wear nice clothes, but their clothes are not ( color /colourful /colored/ colourfully) or fancy. They do not like people (to look at them/ looking at them/ looked at them/ to looking at them) Clothes today are very different (at/ from/ to/in) the clothes 1800s. One difference is the way they look. For example, in the 1800s, all women (wear/worn/wore/wearing) dress. The dresses all had long skirts. Another difference between 1800s and today is the (cloth/ clothe/clothing /clothes) In the 1800s, clothes (were made only by/ were made only in/ were made only of /were made only from) natural kinds of cloth. They are made from cotton, wool, silk or linen. But today, there are (many/much a little /any) kinds of man-made cloth.
\(\left(xy+3\right)^2+\left(x+y\right)^2=8\)
\(\Leftrightarrow x^2y^2+x^2+y^2+1=-8xy\)
\(\dfrac{x}{x^2+1}+\dfrac{y}{y^2+1}=-\dfrac{1}{4}\Leftrightarrow\dfrac{\left(xy+1\right)\left(x+y\right)}{x^2y^2+x^2+y^2+1}=-\dfrac{1}{4}\)
\(\Rightarrow\dfrac{\left(xy+1\right)\left(x+y\right)}{-8xy}=-\dfrac{1}{4}\)
\(\Rightarrow\left(xy+1\right)\left(x+y\right)=2xy\)
\(\Rightarrow x+y=\dfrac{2xy}{xy+1}\)
Thế vào pt ban đầu:
\(\left(xy+3\right)^2+\left(\dfrac{2xy}{xy+1}\right)^2=8\)
Đặt \(xy+1=t\Rightarrow\left(t+2\right)^2+4\left(\dfrac{t-1}{t}\right)^2=8\)
\(\Rightarrow\left(t^2+2t\right)^2-4\left(t^2+2t\right)+4=0\)
\(\Leftrightarrow\left(t^2+2t-2\right)^2=0\)
\(\Rightarrow\left[{}\begin{matrix}t=-1-\sqrt{3}\\t=-1+\sqrt{3}\end{matrix}\right.\) \(\Rightarrow\left[{}\begin{matrix}xy=-2-\sqrt{3}\Rightarrow x+y=1+\sqrt{3}\\xy=-2+\sqrt{3}\Rightarrow x+y=1-\sqrt{3}\end{matrix}\right.\)
\(\Rightarrow x;y\) là nghiệm của: \(\left[{}\begin{matrix}X^2-\left(1+\sqrt{3}\right)X-2-\sqrt{3}=0\\X^2-\left(1-\sqrt{3}\right)X-2+\sqrt{3}=0\end{matrix}\right.\)
\(\Rightarrow...\)
1. cloth
2. litter
3. town
4. lion
5. cycle
6. come