(x+1)(y+1)
=xy + x + y + 1
=xy + ( x+y)+1
=4 + 6 +1
=11
Đáp án:
`11`
Giải thích các bước giải:
`(x + 1)(y + 1)`
`= xy + x + y + 1`
Thay `x + y = 6, xy = 4` vào biểu thức, ta được:
`4 + 6 + 1`
`= 10 + 1`
`= 11`
1. We …… on the lake when it started to rain so we went home. A. finished B. finishing C. were finishing D. are finishing 2. My dad found some money while he …… his suitcase. A. packing B. package C. are packing D. was packing 3. My brother ……… in Ireland when he met his girlfriend. A. study B. was studying C. were study D. was study 4. My grandma tried pizza for the first time while she ………. in Italy. A. staying B. is staying C. is stayed D. was staying 5. My mom ………. in the sea when she saw a dolphin. A. was swimming B. was swiming C. were swimming D. were swiming 6. ……. it ……. when you woke up this morning? A. Is….raining B. was ….. raining C. is….rain D.were…… raining 7. What …….. when the teacher came? A. were you doing B. was you doing C. are you doing D. are you doing 8. What did you watch on TV while you …….. dinner yesterday? A. were having B. was having C. were haveing D. was haveing 9. The man ………. his letter in the post office at that time. A. is sending B. was sending C. sending D. was senting 10. It ………and cloudy when we left Ireland. A. was rain B. was raining C. is raining D. raining
Giúp mình vs mình cho vote cho 5sao
Sự ra đời của nước Cộng hòa nhân dân Trung Hoa. Ý nghĩa lịch sử (Sự kiện nào đánh dấu chủ nghĩa xã hội trở thành hệ thống thế giới ? Nêu hiểu biết của em về sự kiện đó)
Cíu em với đi mọi người ơi 5 sao + vote nữa ạ
ho tứ giác ABCD có góc 𝐵𝐶𝐷 ̂ < 𝐴𝐷𝐶 ̂ < 90 và AD = BC. Gọi M, N là trung điểm của AB và CD. Gọi E là giao điểm của AD và BC. Gọi P, Q là trung điểm của AC và BD. Chứng minh tam giác MPQ cân.
Write the correct form of the word in brackets 1.An ______ is a child whose parents are dead. (ORPHANAGE) 2. People in my country are very warm and _______. (FRIEND) 3. Role – play is ______ in developing communication skills (HELP) 4. It was _____ of him to offer to pay for us both. (GENEROUSITY) 5. I’m _____ sorry for the delay. (EXTREME)
Đầu bài là chuyển thành câu bị động
1. they/water/and/take great care/tree/during/first month. 2. they/carry/recycled bags/put/rubbish/in. 3. community organise/activity/once a month. 4. they/ walk along/beach/and collect/all/rubbish. 5. activity/be often done/spring. 6. they/ dig/hole/ put/young tree/in.
Cho hình bình hành ABCD(AB>BC) có M,N lần lượt là trung điểm của AB, CD a)Chứng minh: AMCN là hình bình hành b) Chứng minh:AC, BD, MN đồng quy c) Gọi E là giao điểm của AD và MC.chứng minh:AM là đường trung bình của tam giác ECD
help me nhanh nha , cảm ơn trước
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