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ngathptng
2 năm trước
giải các phương trình và bất phương trình sau a) |3x2-2x-1|< |x2-1| b) |x2-5x+9| <|x-6| c) |x2-2x| +x2-4 >0 d) |x2 -1|=x2-2x +8 f) |x2-3x +2| = 2x +1
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1. He fell and hurt himself quite ____________. (bad) 2. He is a __________worker. He works _____________ all day. (busy) 3. Drive a little more _____________ so that they can catch up with us. (slow) 4. The crowd became more and more ___________ when the striker was going to shoot the ball. (excited) 5. The little girl looks __________. She is looking at the robot____________. (fearful) 6. She sang the song _____________. She has a ______________voice. (beautiful) 7. It is such a ____________test that many of us cannot do it. (hard) 8. He broke the vase because he was _______________. I don’t know why he always does things so ______________. (careless) 9. The girl behaves _____________. She always shows ______________manners. (good) 10. Don’t go up that ladder. It doesn’t look ____________. (safe)

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