Question

Giúp em bài 1 với ạ

Answer 1

Bài 1: 

a: \(=3xy\left(x-2y\right)\)

b: \(=3x\left(x-11\right)+2\left(x-11\right)=\left(x-11\right)\left(3x+2\right)\)

Answer 2

Bài 1:

`a, 3x^2y - 6xy^2`

`= 3xy(x-2y)`.

`b, 3x(x-11) - 2(11-x)`

`= 3x (x-11) + 2(x-11)`

`= (3x+2)(x-11)`

`c, 7x^2 - 7y^2 - 14x + 7`

`= 7(x^2 - 2x + 1 - y^2)`

`= 7[(x-1)^2 - y^2]`

`= 7(x-1-y)(x-1+y)`

`d, 81x^4 + 4`

`= 81x^4 + 36x^2 + 4 - 36x^2`

`= (9x^2 + 2)^2 - (6x)^2`

`=(9x^2-6x+2)(9x^2+6x+2)`

Answer 3

Bài 1. a) = 3xy(x - 2y)

b) = (x-11)(3x+2)

c) =  7(x + y - 1)(x - y - 1)

d) = (9x^2 + 6x + 2)(9x^2 - 6x + 2)