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23)cho ax+by-cz=0 và a+b-c=1000 CMR: ax^2+by^2-cz^2/-bc(y-z)^2-ca(z-x)^2+ab(x-y)^2 =1/1000 Moi nguoi giup minh voi a minh dang can gap a
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Homework: Use phrases to combine each pair of sentences below. (in order to/ so as to)) 1. I’m studying hard. I want to keep pace with my classmates. …………………………………………………………………………………… 2. We prepare our lessons carefully. We want to get good marks. …………………………………………………………………………………… 3. Please shut the door. I don’t want the puppy to go out of the kitchen. …………………………………………………………………………………… 4. She stayed at work late. She wanted to complete the report. …………………………………………………………………………………… 5. You should walk slowly. Your brother can follow you. …………………………………………………………………………………… 6. Mr. Brown did the job well. He didn’t want to get low salary. …………………………………………………………………………………… 7. We turned on the lights. We didn’t want to waste electricity …………………………………………………………………………………… 8. We lower the volume of the radio. We don’t want to bother our neighbors. …………………………………………………………………………………… 9. The robber changed his address all the time. He didn’t want the police to find him. …………………………………………………………………………………… 10. The man spoke loudly. He wanted everybody to hear him clearly. ………………………………………………………………………………… help meeee >3 gấp lắm ạ

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