Câu `01`:
`(1+x)^3`
`=x^3+3.x^{2}.1+3.x.1^2+1^3`
`=x^3+3x^2+3x+1`
`->` Chọn `A`
Câu `02`:
`x^2-25`
`=x^2-5^2`
`=(x-5)(x+5)`
`->` Chọn `C`
1/
`= 1 + 3x + 3x^2 +x^3`
`=>` Chọn `A` .
2/
`x^2 -25`
`= (x-5)(x+5)`
`=>` Chọn `C` .
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III. Find and correct mistake in each sentence. 1. We shouldn’t throwing trash on the street. A B C D ………………………… 2. There isn’t some butter in the store. A B C D ………………………… 3. How much bottles of water do you have? A B C D ………………………… 4. What about see a movie tonight? A B C D …………………………
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Question 43. UNICEF____ supports and funds for the most disadvantaged children all over the world. A. presents B. assists C. provides D. offers Question 44. We are a very family and support each other through any crisis. A. old-established B. close-knit C. hard-up D. well-to-do Question 45. Her family and friends have given her lots of A. supports B. support C. supporters D. supportive Question 46. She was brought up in a____family. She can’t understand the financial problem we are facing. A. kind B. wealthy C. broke D. poor Question 47. Mark enjoys having fun by causing trouble. He's a very boy. A. stubborn B. mischievous C. spoiled D. bright Question 48. is a family unit that consists of a father, a mother, and their children. A. nuclear family B. single-parent family C. extended family D. big family Question 49. The friendly products are designed not to harm the natural environment. A. environment B. environmental C. environmentally D. environmentalist Question 50. "Excuse me. Where is the office of OXFAM located?" A. leading B. head C. central D. summit Question 51. It is not always easy to make a good at the last minute. A. decide B. decision C. decisive D. decisively Question 52. Mr.Brown has kindly agreed to spare us some of his time to answer our questions. A. valuable B. worthy C. costly D. beneficial Question 53. A survey was to study the effects of smoking on young adults. A.commented B. filled C. conducted D. carried
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