cooker là cái nồi cơm điện đó ông ơi! Dùng cook (cook vừa là động từ vừa là danh từ) hoặc chef nhé =_)

Cá hồi nướng cho tối nay!

a) \(\Leftrightarrow x^2\left(x+5\right)-9x-45=0\)
    \(\Leftrightarrow x^2\left(x+5\right)-9x\left(x+5\right)=0\)
    \(\Leftrightarrow\left(x+5\right)\left(x^2-9\right)=0\)
    \(\Leftrightarrow\left(x+5\right)\left(x-3\right)\left(x+3\right)=0\)
    \(\Leftrightarrow\left[{}\begin{matrix}x+5=0\\x-3=0\\x+3=0\end{matrix}\right.\)
    \(\Leftrightarrow\left[{}\begin{matrix}x=-5\\x=3\\x=-3\end{matrix}\right.\)
Vậy...
b) \(\Leftrightarrow\left(1-2x\right)^2-\left(3x-2\right)^2=0\)
    \(\Leftrightarrow\left(1-2x-3x+2\right)\left(1-2x+3x-2\right)=0\)
    \(\Leftrightarrow\left(3-5x\right)\left(x-1\right)=0\)
    \(\Leftrightarrow\left[{}\begin{matrix}3-5x=0\\x-1=0\end{matrix}\right.\)
    \(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{3}{5}\\x=1\end{matrix}\right.\)
Vậy...

People were annoyed about not being able to see properly.

Question 4.
71. C
72. B
73. A
74. C
75. B

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

d) \(=\left(2x+1\right)^2-\left(3y\right)^2\)
    \(=\left(2x-3y+1\right)\left(2x+3y+1\right)\)
e) \(=2x^2+xy-10xy-5y^2\)
    \(=x\left(2x+y\right)-5y\left(2x+y\right)\)
    \(=\left(2x+y\right)\left(x-5y\right)\)

1. didn't go
2. doesn't rain
3. learn
4. are they talking
5. goes
6. wrote
7. to live/are living
8. will help
9. is having
10. came

I.
1. C
2. D

II.
3. C
4. C
5. B
6. D
7. A
8. C
9. B
10. D