Giải hệ phương trình \(\left\{ \begin{array}{l}3x + 4y = 5\\x - 4y = 3\end{array} \right.\)
A.\(\left( {x;y} \right) = \left( {2; - \dfrac{1}{4}} \right)\)
B.\(\left ( x;y \right ) = \left ( 1;-\dfrac{1}{2} \right )\)
C.\(\left ( x;y \right ) = \left ( -1;-1 \right )\)
D.\(\left ( x;y \right ) = \left ( -2;-\dfrac{5}{4} \right )\)
A.\(\left( {x;y} \right) = \left( {2; - \dfrac{1}{4}} \right)\)
B.\(\left ( x;y \right ) = \left ( 1;-\dfrac{1}{2} \right )\)
C.\(\left ( x;y \right ) = \left ( -1;-1 \right )\)
D.\(\left ( x;y \right ) = \left ( -2;-\dfrac{5}{4} \right )\)
Loga
Hóa Học lớp 12
