so sánh hơn : Noun (subject) + verb + comparative adjective + than + noun (object).
So sanh hơn nhất : Noun (subject) + verb + the + superlative adjective + noun (object).
Bài 11:
a: Ta có: \(\left(x-2\right)\left(x-1\right)=x\left(2x+1\right)+2\)
\(\Leftrightarrow2x^2+x+2-x^2+3x-2=0\)
\(\Leftrightarrow x\left(x+4\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x=-4\end{matrix}\right.\)



