timeable

Physics

What time

lessons

will

favorite

an

too

\(\Rightarrow\left(2x^3-x^2\right)+\left(2x-1\right)=0\)

\(\Rightarrow x^2.\left(2x-1\right)+\left(2x-1\right)=0\)

\(\Rightarrow\left(2x-1\right).\left(x^2+1\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}2x-1=0\\x^2+1=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}2x=1\\x^2=1\end{matrix}\right.\)(loại do x² ≥ 0 ) \(\Rightarrow x=\dfrac{1}{2}\)

= (2x)³ - 1³ = 8x³ -1

Đổi 2 giờ 30 phút = 2,5 giờ

Vân tốc xe máy là:

120 : 2,5 = 48 (km/h)
 

C

D

C

A

1.   A. watches   B. tables             C. houses             D. buses

2. A. computer     B. sun                    C. funny               D. lunch

3. A. beds              B. cookers          C. lamps               D. sofas

4. A. home              B. photo               C. going               D. brother

5.   A. flats       B. lamps               C. fridges           D. books

6. A. clocks          B. dishwashers C. curtains        D. cupboards

7. A. club              B. rubber             C. subject           D. music

8. A. sofa              B. town                 C. close               D. know

câu 4 mik ko chắc lắm đôu :<

B->tall enough

C -> play

D-> much more important

A -> says

A-> interested in

D

look after: chăm sóc