Tìm số tự nhiên x để các số sau là số chính phương:
a) x^2-14x-256
b) x^2+x+10

Cho biểu thức A= (x – 2)(x+4)

    Tìm  số tự nhiên x   để  A có giá trị là số nguyên tố

    Tìm  số nguyên x  để biểu thức A có giá trị  là số âm
Mình cần gấp lắm. Giúp mình với.

Asking for Directions

Asking for directions can be risky. I realized exactly how risky it ^oịild be \yhen I needed to meet one of my friends one day. A while ago, I arrangẻd to meet my friend at a new mall. My friend had been there before and indicated that we should shop there together.

We planned to meet at 3:00 p.m. at Burger Palace in the mall. When I arrived at the mall, I realized I did not know where Burger Palace was, so I asked a woman for directions. She advised me to go straight past the bank, and turn right before the food court. She mentioned that I would walk for a few minutes, passing a shoe store until I reached Burger Palace, which was next to the bookstore. I followed her directions and arrived just in time.

Twenty minutes later, I was beginning to wonder where my friend was. Thirty minutes later, I was worried. I did not know what to do, so I just kept waiting. At around 3:40 p.m., I saw my friend walking quickly toward me. I rushed to him and demanded to know what happened. “I was at the other Burger Palace!” he cried. We had not realized there were two Burger Palaces in the mall. Since then, I have made sure that I get the directions from my friends before I go to meet them. It saves me a lot of trouble!

1.Where did the writer plan to meet her friend?______________________________________

2.How did the woman give the directions?_________________________________________

3.Was the writer happy when she was waiting for her friend ?_______________________

4.How many Burger Palaces are there in the mall?____________________________________

5.What is the writer’s experience ?  ___________________________________________

The Temple of Literature is about 10 minutes away from Hoan Kiem Lake. It was constructed in 1070 under Ly Thanh Tong’s dynasty, first to honor Confucius and nowadays to celebrate the doctorate and high rank scholar of Vietnam. In 1076, Emperor Ly Nhan Tong continued the work and built the Imperial Academy as the first university of Vietnam.

      The Temple is divided into five courtyards. The first courtyard is from the main gate to Dai Trung Gate. The second is with Khue Van Pavilion. The pavilion symbol is used on the street signs of Ha Noi. The third courtyard is the place where the doctorate names were listed on the stone tablets above tortoise backs. The fourth courtyard is dedicated for Confucius and his 72 honored students, as well as Chu Van An - one of the most famous teachers at the Imperial Academy. The last is also the farthest courtyard is Thai Hoc House, which was used as the Imperial Academy. Thai Hoc House holds a small collection of old-time costumes for students and scholars.

      1.   Where is the Temple of Literature?

            _____________________________________________________________________

      2.   When and by whom was it built?

            _____________________________________________________________________

      3.   How many courtyards are there in the Temple of Literature?

            _____________________________________________________________________

      4.   Which courtyard is with Khue Van Pavilion?

            __________________________________________________    5.   What is the Pavilion symbol used on?

            ___________________________________________________

Liên hệ trong thực tế về tác dụng của bóng hơi của cá để tìm ví dụ (không lấy cá chép)
TRả lời nhanh mình vote cho mình đang cần gấp

Cho tam giác ABC có góc A=90 độ, tia phân giác của góc C cắt AB ở I. Trên cạch BC lấy điểm M sao cho AC=CM

a) Vẽ hình. Ghi giả thuyết, kết luận

b) Chứng minh tam giác ACI= tam giác MCI

c) Chứng minh IM vông góc với BC

d) Trên tia đối của tia IM lấy K sao cho IK=IB. Chứng minh C,A,K thẳng hàng
Mọi người giải mình câu d với ạ, mình đang cần gấp