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cho phương trình: x^2-mx+m-6=0. Tìm m để phương trình có 2 nghiệm phân biệt x1:x2 thỏa mãn a)lx1-x2l=căn20 b)lx1l+lx2l=6
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Dong Hoa, October 10 Send your artwork to our festival to win great prizes! The Young Artists Biennale will be (1)___ next month. It is one of the most (2)___ art festival in Vietnam. It was first held in 2009 and takes place very two years in Ho Chi Minh City. The festival is for all artists aged between 18 (3)___ 45. The festival is open to all kinds of art. You can see beautiful sculptures, pictures, and paintings. One of the past winners is Tran Quoc Toan. He is from Hai Phong. In 2011, his fantastic (4)___ won the first prize ai the Young Artists Biennale. He now shows his paintings in Vietnam, Hong Kong, and Singapore. The best art will win amazing prizes, so please send your if you think you can win 1) A. hold; B. held; C. holds; D. holding 2) A. exciting; B. excited; C. excite; D. excites 3) A. of; B. on; C. and; D. so 4) A. paint; B. paints; C. painting; D. painted

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