Phân tích đa thức thành nhân tử:

a) \(2x^2-5xy-3y^2\)

b) \(4x^2-17xy+13y^2\)

c) \(-7x^2+5xy+12y^2\)

d) \(x^2-11xy+28y^2\)

e) \(x^2-3xy-40y^2\)

CHOose the word whose stress pattern is different from the others.

1. A. constant B. compel C. standard D. contact

2. A. chemistry B. passenger C. examine D. comedy

3. A. terrific B. surprising C. crockery D. successful

4. A. agency B. exchanging C. complicate D. bankruptcy

5. A. accountancy B. category C. customary D. monetary

Choose the word whose underlined part is different from the others.

1. A. explanation B. adventure C. acronym D. addition

2. A. choir B. chill C. chief D. charge

3. A. colony B. company C. colourful D. covering

4. A. throughout B. smooth C. threaten D. thunder

5. A. played B. transformed C. vaporised D. attached