listen nhé

listening nha

are listening nhé!

what do they eat for lunch?

what does he often do every evening?

Being a volunteer is one of the best things you can do with your life. It's a great way to help other people. It's also very satisfying to know that you are not wasting your time and are helping people who need help.Many of us could and should be out there doing voluntary activities of some kind. So many volunteer organizations need extra hands. It really is easy. Just pick up the phone and offer your services.I think too many of us settle into a lazy lifestyle. We just want to come home and watch TV. Life is much more interesting when you're a volunteer.I've found it really opens your eyes to how some people live. It's sometimes sad to see how the government lets people down, but at least I'm doing my bit

Bài 1:

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

b. $=x^3(x+3)+(x+3)=(x^3+1)(x+3)=(x+1)(x^2-x+1)(x+3)$

c. $=64-(x^2-2xy+y^2)=8^2-(x-y)^2$

$=(8-x+y)(8+x-y)$

Bài 2:

$(x+5)(x+1)+(x-2)(x^2+2x+4)-x(x^2+x-2)$

$=x^2+6x+5+(x^3-2^3)-(x^3+x^2-2x)$

$=x^2+6x+5+x^3-8-x^3-x^2+2x$

$=8x-3$

Ta có đpcm.

Bài 4:

$P=a^3+a^2c-abc+b^2c+b^3$

$=a^2(a+c)-abc+b^2(b+c)$

$=a^2(-b)-abc+b^2(-a)=-a^2b-abc-b^2a$

$=-ab(a+c+b)=-ab.0=0$

bn ơi bài 7 mk chẳng thấy tia Cz nằm đâu cả

Đề kiểm tra phải tự lm chứ. Tự nghĩ đi rồi lm

kiểm tra thì bn nên tự làm..

Không đây là đề cũ cô lấy làm bài tập về nhà.

1.someone cleans my house every week.

=I.....have my house cleaned......

2.I asked my parents to pay for my flight home

=I.......asked my flight home to be paid by my parents..........

3.Our heater needs repairing

=we will......have our heater repaired.......

4.A beautician does her nails every week

=She......has her nails done by a beautician.........

5.The dentist is filling her cavity now

=She......is having her cavity filled by the dentist...............