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Toán học - Lớp 8

21/01 11:02:45

B) Đa thức \(2x^2 + x + a\) chia hết cho đa thức \(x + 3\) c) Đa thức \(3x^2 + ax - 4\) chia hết cho đa thức \(x - a\)

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Toán học - Lớp 8

21/01 10:50:54

Bài 4: Cho hình chữ nhật ABCD. Gọi M, N lần lượt là trung điểm của BC, CD. Gọi giao điểm của AM, AN với BD lần lượt là P, Q. Gọi AC cắt BD tại O. Chứng minh rằng: a) \( AP = \frac{2}{3}AM, AQ = \frac{2}{3}AN. \) b) \( BP = PQ = QD = 2 \cdot OP. \)

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Toán học - Lớp 8

21/01 10:44:10

Rút gọn biểu thức sau:(x – 2y)(x^2+ 2xy + 4y^2) + (x + 2y)(x^2– 2xy + 4y^2)

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Toán học - Lớp 8

21/01 10:31:40

Với hai số bất kì, viết a^3 – b^3 = a^3 + (–b)^3 và sử dụng hằng đẳng thức tổng hai lập phương để tính a^3 + (–b)^3. Từ đó rút ra liên hệ giữa a^3 – b^3 và (a – b)(a^2 + ab + b^2)

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Tiếng Anh - Lớp 8

21/01 09:42:02

1. To meet her parents' ______, she spends five hours practising the piano every day. 2. It's not a problem for the contestants to work under ______. 3. Their PE teacher ______ them after school every day. 4. Stay away from him. He is a big ______ at our school. 5. I started playing chess two months ago, and I can ______ better now than before

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Tiếng Anh - Lớp 8

21/01 09:53:53

VIII. Rewrite the sentences using the word given in brackets. 36. I can't understand him because he speaks so quickly. => If ________________________________________ 37. You had better not lend him any more money, Amanda" said John. => John advised Amanda ________________________ 38. Many natural disasters have been caused by global warming. => Global warming _____________________________ 39. Talking to your family members every day is very important. => It is ___________________________________________ 40. “Is your uncle working as a pilot for NASA?” Julia asked me. => Julia asked _____________________________________

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Tiếng Anh - Lớp 8

21/01 09:44:43

Nam was a good student. But he started using a smartphone and spending too much time on (1) _______ like Facebook and TikTok. He also liked joining in chit-chat and game (2) ______ for teens. He spent a lot of time (3) _______ notifications. He even neglected his schoolwork, and stopped (4) ________ with his classmates, friends, and family members. One day Nam saw a video clip about a boy who was addicted to games, and had no friends, so when the boy was feeling down, he (5) _________ others. Nam realised that he also had no more friends, except his younger brother. 1. A. forum B. social media C. website D. notifications 2. A. notifications B. posts ..

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