\(\left(2x+3y\right)^3=8x^3+36x^2y+54xy^2+27y^3\)

31 dm

64 nhé

She has enough free time to go to the movies with you.

B

Đề bài \(\Rightarrow\dfrac{1}{2}-\dfrac{2}{3}x=\dfrac{7}{12}\Rightarrow\dfrac{1}{2}-\dfrac{7}{12}=\dfrac{2}{3}x\Rightarrow\dfrac{-1}{12}=\dfrac{2}{3}x\Rightarrow x=\dfrac{-1}{12}:\dfrac{2}{3}=-\dfrac{1}{8}\)
 

The radio is not small enough for you to put it in your poker.

The radio is too big for you to put it in your poker.

Where does he come from
 

Đề bài \(\Rightarrow\dfrac{6x}{4}=\dfrac{6y}{9}=\dfrac{6x-6y}{4-9}=\dfrac{6.\left(x-y\right)}{-5}=\dfrac{6.-13}{-5}=\dfrac{78}{5}\Rightarrow\left\{{}\begin{matrix}x=\dfrac{52}{5}\\y=\dfrac{117}{5}\end{matrix}\right.\)