\(\left(x-1\right)\left(x+2\right)=0\)\(\Rightarrow\left[{}\begin{matrix}x-1=0\\x+2=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=1\\x=-2\end{matrix}\right.\)\(\text{#}Toru\)Câu trả lời: \(\left(x-1\right)\left(x+2\right)=0\)\(\Rightarrow\left[{}\begin{matrix}x-1=0\\x+2=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=1\\x=-2\end{matrix}\right.\)\(\text{#}Toru\)