Nhìu thiệt á, tách bớt ra đi nhé!

goes
leaves
gets up
plays
do you usually get
opens - closes
visit
study
don't feel like
have
does the train for HCM city leave
recognize
do you do 
comes back - want

Bài 5:

a) \(x^2-xy+x-y\)

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

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

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

b) \(xz+yz+4x+4y\)

\(=\left(xz+yz\right)+\left(4x+4y\right)\)

\(=z\left(x+y\right)+4\left(x+y\right)\)

\(=\left(z+4\right)\left(x+y\right)\)

c) \(x^2-x-y^2+y\)

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

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

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

d) \(x^2+2x+2z-z^2\)

\(=\left(x^2-z^2\right)+\left(2x+2z\right)\)

\(=\left(x+z\right)\left(x-z\right)+2\left(x+z\right)\)

\(=\left(x+z\right)\left(x-z+2\right)\)

cần câu nào ?b

C5:

nC2H5OH = 8,2 / 46 = 0,2 (mol)

C2H5OH + 3O2-- (t^o)-- > 2CO2 + 3H2O

VCO2 = 0,4 . 22,4 = 8,96 (l)

VO2 = 0,6.22,4=13,44 (l)

toán đâu mà giải

28 I haven't gone to HCM City for 2 years

29 We have lived in My Tho for ten years

30 Lan didn't go to school last week

31 He was at home yesterday

Question8:

29. We live in Phu Tho about ten years.

30. I will see him tomorrow.

31. Lan didn't go to school last week

32. He was at home yesterday.