$(8x+5)\,\vdots\,(x+2)\\\to (8x+16)-11\,\vdots\,(x+2)\\\to 8(x+2)-11\,\vdots\,(x+2)\\\to\,11\,\vdots\,(x+2)\\\to\,(x+2)\in{Ư(11)=\{\pm1;\,\pm11\}}\\\to\,x\in{\{-1; -3; 9; -13\}}$
8x+5 chia hết x+2
=>8x+16-9 chia hết x+2
=>8*(x+2)-9 chia hết x+2
=>9 chia hết x+2
=> x+2 thuộc Ư(9)={±1;±3;±9}
=>x+2=1=>x=-1
x+2=-1=>x=-3
=>x+2=3=>x=1
x+2=-3=>x=-5
=>x+2=9=>x=7
x+2=-9=>x=-11
Vậy x thuộc {±1;-3;-5;7;-11}
Ai bt làm câu 7,8 chỉ mk vs nha😢😢
Giúp mk vs ạ Ai lm đc mk vote 5*cho nha
làm hộ mình bài 4 và 5 với ạ cảm ơn
ĐỀ 7: 2.Tính: a, -9 - 13 - (-24) + 11 b, 323 - 6 [3 - 7 . (-9)] c, (-3)^5 : (-3)^3 - 9 d, (-8) . 16 - 138 _______________________ 3.Tìm x∈z , biết: a, -15 : x = 3 b, -3x + 8 = -7 c, (x - 6) . (7 - x) = 0 _______________________ 4.Tìm x;y ∈ Z biết: a, (x - 3) . (2y + 1) = 7 b, (2x + 1) . (3 y - 2) = -55 _________________________ _Hết_
Viết một đoạn văn (không dưới 5 câu) chủ đề tự chọn, trong đó có sử dụng ít nhất một trạng ngữ . (gạch chân dưới trạng ngữ )
Viết 1 đoạn văn (80-120 từ) về 1 số cách bảo vệ bản thân khỏi virus Corona. #Giúp mình với nha!!! Thanks
Cho tam giác ABC cân tại A, trên cạnh AB lấy điểm D sao cho AD = DC = BC. Góc A bằng : A. 30 độ B. 36 độ C. 45 độ D. 55 độ
1.Choose My favourite hobby is coin (1) . It is also one of the oldest (2) of the world and is also called 'hobby of the Kings', as in the old times, it was only done by kings and elite class of the society. It started for me some years back when my father used to come back (3) his foreign tours and give me coins of(4) countries. I started collecting them in my money box and after that I always used to wait for my new coins as much I used to wait for my father. Since then, it has become my favourite hobby. This hobby has given me information about different countries of the world. I feel extreme pleasure in (5) my collection to (6) . It has also taught me this lesson that A LIFE (7) A HOBBY IS JUST (8) FOOD WITHOUT SALT. 1. A. collecting B. collection C. collected D. collectors 2. A. hobby B. hobbies C. game D. games 3. A. after B. in C. from D. of 4. A. other B. different C. unlike D. diverse 5. A. showing B. show C. shown D. to show 6. A. other B. another C. others D. person 7. A. with B. about C. without D. of 8. A. as B. like C. if D. likes
1. What do you__________in your ______time ? I __________ cartoons on TV. 2. What ___ you doing? – I’m __________chess. 3. Hoa and I_______to the music club and _______ many songs. 4. Do you like________ sport programmes? – No, I ______. I like _________books. 5. What______you? What do you do in your free______? – I often ride a ______in the park. 6. What ____ your father do in _____ free time? - _______ goes fishing. 7. My sister __________ to music and _______ the Internet in her free time. 8. His mother_______________shopping _____weekends. 9. I _____ my house every day. 10. My friends often______ karate in the evening. điền từ nhé
giúp mình bài 3 b,c ạ mình cần gấp
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