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x2+3xy−9y2+23y−17=0 x2−2xy+3y2−6y−3=0
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Exercise 8: Find the word whose stress pattern is different from the others of the same group. 1. A. disease B. humor C. cancer D. treatment 2. A. remedy B. exercise C. pollution D. surgery 3. A. pneumonia B. activity C. psychiatrist D. ordinary 4. A. persuade B. reduce C. offer D. apply 5. A. expression B. successful C. physical D. prevention 6. A. farmer B. farewell C. factory D. fairy 7. A. cattle B. country C. canal D. cover 8. A. money B. machine C. many D. mother 9. A. borrow B. agree C. await D. prepare 10. A. government B. condition C. parliament D. fortunate 11. A. paper B. police C. people D. purpose 12. A. interesting B. important C. increasing D. implying 13. A. element B. enormous C. animal D. elephant 14. A. damage B. destroy C. demand D. deny 15. A. biology B. intelligent C. environment D. infrastructure 16. A. ancient B. attack C. alive D. across 17. A. person B. purpose C. possess D. pirate 18. A. eternal B. enormous C. enemy D. Egyptian 19. A. ruler B. river C. retire D. rapid 20. A. revolution B. responsible C. renovation D. regulation

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