phân tích thành nhân tử a"2 - a + 1

1. This house ______ in 1990 by my grandfather A, is built. B, was built. C, built. D, has built 2. My sister is going _____ this house A, sold. B, sell. C, to be sold. D, to sell 3. There's a man behind us. I thik we are _____ A, being followed. B, be followed C, followed D, following 4. Have you ______ by a dog? A, ever bite. B, ever bitten. C, ever been bitten. D, ever been bite 5. The house ______ since last week A, bought. B, has bought. C, was bought. D, has been bought 6. The homework _______ by Nam every day A, is done. B, does. C, are done. D, did 7 These exercises must ______ by my students A, are finished. B, finish. C, be finished. D, finishing

1. (x-5) (x-4)-(x+1) (x-2)=7 2. 5x(x-3)=(x-2)(5x-1)-5 GIÚP MIK VỚI AH. CẢM ƠN NHIỀU

B1: Tìm x,y,z a) x mũ 2 - 6x + y mũ 2 + 1oy + 34 = -( 4z - 1 ) mũ2 b) x mũ 2 - 2x + y mũ 2 + 4y +5+ ( 2z - 3 ) mũ 2 = 0 B3 Cho m= 24( 5 mũ 2 + 1 )( 5 mũ 4 + 1)( 5 mũ 8 + 1)( 5 mũ 16+ 1) và n= 5 mũ 32. So sánh m và n

giúp mình với hứa vote 5* và ctlhn LÀM HẾT NHA

thầm lặng, mạnh mẽ, bàn tay,đôi mắt,hy vọng, anh em, thách thức, gian nan đâu là từ láy từ ghép tông hợp chính phụ

Mọi người giúp em với ạ 😥 Tìm m, biết: (x² - x + 1)x - (x + 1)x ² + m = -2x ² + x + 5

Câu hỏi 4 (7 điểm): Complete the conversation. Put in the Past Simple negatives and questions. Claire: Did you have (you / have) a nice weekend in Paris? Mark: Yes, thanks. It was good. We looked around and then we saw a show. (1) …………………(we / not / try) to do too much. Claire: What sights (2) ………………. (you / see)? Mark: We had a look round the Louvre. (3) ……………………….(I / not / know) there was so much in there. Claire: And what show (4) …………………..…..(you / go) to? Mark: Oh, a musical. I forget the name. (5) ……………………………. (I / not / like) it. Claire: Oh, dear. And (6) ………………………… (Sarah / enjoy) it? Mark: No, not really. But we enjoyed the weekend. Sarah did some shopping, too, but (7) ………………. (I / not / want) to go shopping.

(2x+1)^2-(5x-2)^2 x^2+4x=5 (3x-2)^2 - (7x+9)^2=0

Thiên càn là gì ? Địa khôn là gì ạ?