Phân tích đa thức thành nhân tử bằng pp dùng hàng đẳng thức 1,a^2-4b^2 2,4a^2-b^2 3,a^2-25 Giúpppppppppppp

Vẽ mầm zui zẻ ik vừa bị khóa acc

Mk cần gấp. Mong mọi người giúp mik

`x^2-2x-8=0` Helpaaaaaaaaaaaaaaaaaaaaaaa

mn giúp mình với mình đg cần gấp mình cảm ơn Choose the sentences which has the same meaning as the first. She was very nervous before every geography exam. A. She used to being very nervous before every geography exam. B. She use to being very nervous before every geography exam. C. She used to be very nervous before every geography exam. D. She use to be very nervous before every geography exam 30.Mark the letter A, B, C or D to indicate the word that differs from the rest in the position of the main stress in each of the following questions. A. festival B. effective C. seasonal D. plentiful 31.Choose the sentences which has the same meaning as the first. The distance between Paris and London is about 470 kilometres. A. It is about 470 kilometers between Paris London. B. It is about 470 kilometers from Paris to London. C. It is about 470 kilometers between Paris to London. D. It is about 470 kilometers from Paris and London. 32.Read the following passage and choose the correct answer for each gap. The world's population passed five-billion mark in 1987 and it is increasing (1)________ about 1.7% a year. At this rate of growth, the number of people in the world will double every 41 years. This rapid increase has been called the (2)________ explosion. No one knows how many people the Earth can (3)________. Many scientists believe that the world will soon become (4)________, that is, it will have more people than it can support. 4. A. polluted B. overpopulated C. populated D. overpopulation A. polluted B. overpopulated C. populated D. overpopulation 33.Read the following passage and choose the correct answer for each gap. The world's population passed five-billion mark in 1987 and it is increasing (1)________ about 1.7% a year. At this rate of growth, the number of people in the world will double every 41 years. This rapid increase has been called the (2)________ explosion. No one knows how many people the Earth can (3)________. Many scientists believe that the world will soon become (4)________, that is, it will have more people than it can support. 1. A. to B. by C. in D. of A. to B. by C. in D. of 34.Choose the correct answer. We/ travel/ Da Nang/ at this time/ next week. A. We will be travelling to Da Nang at this time next week. B. We will travel Da Nang at this time next week. C. We will travel to Da Nang at this time next week. D. We travel Da Nang at this time next week.

Pt 3x - 6 = 0 có nghiệm duy nhất là ? A. X = - 2 B. X = 2 C. X = 3 D. X = - 3

Vẽ đậu mầm ai zô chát đê k8 càng tốt

Mòng mn giúp mik Làm đề này cảm ơn nh ạ

Giúp em làm b2 từ câu d trở xuống ạ

bài 5 đề 7 ạ mog các cậu giúp mk