Respuesta :
Hello,
[tex]\Delta=\begin{array}{|cc|}2&-1\\-1&5\end{array}=2*5-(-1)*(-1)=10-1=9\\ \Delta \neq 0 ==\ \textgreater \ 1\ solution\\ [/tex]
Answer A
[tex]\Delta=\begin{array}{|cc|}2&-1\\-1&5\end{array}=2*5-(-1)*(-1)=10-1=9\\ \Delta \neq 0 ==\ \textgreater \ 1\ solution\\ [/tex]
Answer A
2 x - y = 2
- x + 5 y = 3 / *2
----------------------
2 x - y = 2
+
- 2 x + 10 y = 6
-----------------------
9 y = 8, y = 8/9
2 x - 8/9 = 2
2 x = 2 + 8 /9
2 x = 26/9
x = 13/9
( x, y ) = ( 13/9, 8/9 )
Answer: A ) 1 solution.
- x + 5 y = 3 / *2
----------------------
2 x - y = 2
+
- 2 x + 10 y = 6
-----------------------
9 y = 8, y = 8/9
2 x - 8/9 = 2
2 x = 2 + 8 /9
2 x = 26/9
x = 13/9
( x, y ) = ( 13/9, 8/9 )
Answer: A ) 1 solution.