Question

[Jeon Jung-kook]

1. Thu gọn:

a) (3x-1). (x-2) + (x-1). (x+1)

b) (4x-3). (2x-5) - (8x-2). (x-1)

2. Tìm x:

a) 3x. (x-3) - x. (3x-2) = 2

b) -2x. (x+1) - 3. (1-x) + 2x² = 3

c) (x-2). (x+2) + (3.x). (x+1) = 0

d) (2x-1). (x+3)- (x-2). (2x+1) = 10

Answer 1

[Ngân Vũ Thị]

https://i.imgur.com/EObBEdD.jpg