Câu hỏi của Mina

b: \(\Leftrightarrow\left(x-2021\right)\left(5x-1\right)=0\)\(\Leftrightarrow\left[{}\begin{matrix}x=2021\\x=\dfrac{1}{5}\end{matrix}\right.\)Câu trả lời: b: \(\Leftrightarrow\left(x-2021\right)\left(5x-1\right)=0\)\(\Leftrightarrow\left[{}\begin{matrix}x=2021\\x=\dfrac{1}{5}\end{matrix}\right.\)