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

\(\frac{x}{y}=\frac{5}{3}\Rightarrow\left[\begin{array}{nghiempt}x=5k\\y=3k\end{array}\right.\)

vậy bn mún j

\(M=\frac{\left(2^3\right)^{20}+\left(2^2\right)^{20}}{\left(2^2\right)^{25}+\left(2^6\right)^5}=\frac{2^{60}+2^{40}}{2^{50}+2^{30}}=\frac{2^{40}\left(2^{20}+1\right)}{2^{30}\left(2^{20}+1\right)}=2^{10}\)

Ta có

G A₁ +G B + G C₁=180 độ

(tổng 3 góc trong 1 tam giác)

=> G A₂ +G B₂ =3060  độ -180độ = 180 đô

Mà A1 và C1 là 2 góc trong cùng phía

=> x//y

=>đpcm

Hung: What do you learn (1)..........at............. school, Nam?

Nam:  I learn many different subjects (2) ...........such as........... Math, Literature, History, Geography, Civics,              Physics and so on.

Hung: Which are your (3) ..............favorite.............. subjects?

Nam:  They are English and Math.

Hung: Why do you like them?

Nam:  (4) .........Because.............. they are interesting and important.

Hung: What do you often do (5) .......in.......... your free time?

Nam:  I often (6)........play.......... sports and computer games.

Hung: Do you often read books or (7) ..........listen to................ music?

Nam:  Yes, sometimes. And (8) ........What about........... you?

Hung: I learn to play (9) ......the........... guitar, and I also go to the art (10) ........club............. after school.

Nam:  Oh, it's getting late now. Bye, Hung.

Hung: Bye, Nam. See you tomorrow.