Giải phương trình và hệ phương trình:
a) \({x^2} - 4x + 3 = 0\) b) \(\left\{ \begin{array}{l}5x - 2y = 11\\x + y = - 2\end{array} \right.\)
A.a) \(S = \left\{ {1;3} \right\}\).
b) \(\left( {x;y} \right) = \left( {1; - 3} \right)\).
B.a) \(S = \left\{ {2;3} \right\}\).
b) \(\left( {x;y} \right) = \left( {1; - 3} \right)\).
C.a) \(S = \left\{ {1;3} \right\}\).
b) \(\left( {x;y} \right) = \left( {2; - 3} \right)\).
D.a) \(S = \left\{ {-1;-3} \right\}\).
b) \(\left( {x;y} \right) = \left( {1; - 3} \right)\).
a) \({x^2} - 4x + 3 = 0\) b) \(\left\{ \begin{array}{l}5x - 2y = 11\\x + y = - 2\end{array} \right.\)
A.a) \(S = \left\{ {1;3} \right\}\).
b) \(\left( {x;y} \right) = \left( {1; - 3} \right)\).
B.a) \(S = \left\{ {2;3} \right\}\).
b) \(\left( {x;y} \right) = \left( {1; - 3} \right)\).
C.a) \(S = \left\{ {1;3} \right\}\).
b) \(\left( {x;y} \right) = \left( {2; - 3} \right)\).
D.a) \(S = \left\{ {-1;-3} \right\}\).
b) \(\left( {x;y} \right) = \left( {1; - 3} \right)\).
Loga
Hóa Học lớp 12
