1-f

2-k

3-a

4-c

5-j

6-b

7-h

8-d

9-g

10-i

11-e

a)\(4x^2+x=x\left(4x+1\right)\)

b)\(3x-9y=3\left(x-3y\right)\)

c)\(5\left(x-y\right)-x\left(x-y\right)=\left(5-x\right)\left(x-y\right)\)

d)\(4\left(2x-y\right)-x\left(y-2x\right)=-4\left(y-2x\right)-x\left(y-2x\right)=\left(-4-x\right)\left(y-2x\right)\)

e)\(\left(2x+1\right)^2+2\left(2x+1\right)=\left(2x+1\right)\left(2x+1+2\right)=\left(2x+1\right)\left(2x+3\right)\)

f)\(y\left(x+y\right)-y-x=y\left(x+y\right)-\left(x+y\right)=\left(y-1\right)\left(x+y\right)\)

g)\(2y\left(x-y\right)^2+x\left(y-x\right)^2=2y\left(y-x\right)^2+x\left(y-x\right)^2=\left(2y+x\right)\left(y-x\right)^2\)

h)

h)(x-2)-(x-2)^2=(x-2)(1-x-2)=(x-2)(x-1)

i)x(x-3)-2x+6=x(x-3)-2(x-3)=(x-3)(x-2)

đề đâu bạn

Vậy câu hỏi của bạn đâu 

0.04

2.36

\(0,36:9=0,04\)

\(75,52:32=2,36\)

0,04

2,36