\(\Leftrightarrow\left[{}\begin{matrix}x-\dfrac{1}{4}=\dfrac{7}{2}\\x-\dfrac{1}{4}=-\dfrac{7}{2}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{15}{4}\\x=-\dfrac{13}{4}\end{matrix}\right.\)
Đúng 0
Bình luận (0)