cảm ơn nhiều nhé
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Những câu hỏi liên quan
H
14 tháng 5 2018
I. Nội qui tham gia "Giúp tôi giải toán"
1. Không đưa câu hỏi linh tinh lên diễn đàn, chỉ đưa các bài mà mình không giải được hoặc các câu hỏi hay lên diễn đàn;
2. Không trả lời linh tinh, không phù hợp với nội dung câu hỏi trên diễn đàn.
3. Không "Đúng" vào các câu trả lời linh tinh nhằm gian lận điểm hỏi đáp.
. Giúp mình với nhé cảm ơn nhiều!
AH
Akai Haruma
Giáo viên
19 tháng 6 2021
Bài 1:
\(\sqrt{9-4\sqrt{2}}-3\sqrt{16-6\sqrt{7}}=\sqrt{8+1-2\sqrt{8.1}}-3\sqrt{9+7-2\sqrt{9.7}}\)
\(=\sqrt{(\sqrt{8}-1)^2}-3\sqrt{(\sqrt{9}-\sqrt{7})^2}\)
\(=\sqrt{8}-1-3(\sqrt{9}-\sqrt{7})=-10+2\sqrt{2}+3\sqrt{7}\)
DT
Đỗ Thanh Hải
CTVVIP
19 tháng 4 2021
89 The heavy rain prevented us from enjoying the trip
90 You had better not eat too many candied
91 He drives more slowly and more carefully than Lan does
92 The visitor spoke too quickly for me to understand
DT
Đỗ Thanh Hải
CTVVIP
19 tháng 4 2021
1 Can she look after herself while her mother is away?
2 Could you tell me where is the station?
3 The exam was not as difficult as we thought
4 It will be impossible for them to come on Saturday
5 Their father drove to London last Monday
6 You won't need to go to the meeting next week
7 Sonia isn't interested in Roller-skating
8 You had better ride the bike more carefully next time
9 I wasn't allowed to stay out late when I was young
10 He takes care of the sick people
K
23 tháng 4 2021
1. The Brown family has gone to Switzerland every winter for 4 years
2. My brother has eaten frogs' legs three times
3. Carol has been in Morocco since last month.
4. Timothy has ridden a bus to school since his car broke down
5. Jorge and Carmen have been married since 1980
6. Scientists have been concerned with the world's rainforests for many years
7. James has known how to repair a computer for a long time
8. I have wanted to go to Japan for several years
9. Maria has been excited about space exploration since she was young
10. I have had a bike for two months
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bn cảm ơn ai vậy