2/Cho phương trình x^2−mx+m−1=0. a) Chứng minh rằng phương trình luôn có nghiệm với mọi m . b) Gọi x1;x2 là hai nghiệm của phương trình . Tính giá trị của biểu thức P = 2x1x2 + 3 / x1^2 + x2^2 + 2(x1x2 + 1)

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Use the given words/ phrases to write about what you use English for in your daily life. 1. I/ use/ English/ different purposes/ my everyday life. ………………………………………………………………………………………………………. 2. Firstly, English/ help/ me/ communicate/ people/ the world. ………………………………………………………………………………………………………. 3. I/ make/ friends/ some students/ the UK/ Australia. ………………………………………………………………………………………………………. 4. I/ use/ English/ chat/ them/ many things. ………………………………………………………………………………………………………. 5. Secondly, English/ help/ me/ information/ improve/ knowledge. ………………………………………………………………………………………………………. 6. Because almost nay information/ availabel/ English, ………………………………………………………………………………………………………. 7. it/ easy/ me/ access/ all sources/ information/ my English. ………………………………………………………………………………………………………. 8. Finally, English/ useful when I/ want/ go abroad/ study. ………………………………………………………………………………………………………. 9. A lot/ schools/ universities/ different countries/ provide/ scholarships/ courses/ English. ………………………………………………………………………………………………………. 10. In conclusion, English/ useful/ me/ various ways. ……………………………………………………………………………………………………….