Resposta :
Resposta:
x - y = 0
Explicação passo-a-passo:
[tex]\left|\begin{array}{cccc}x&1&2&x\\y&1&2&y\end{array}\right|_{+} ^{-} = ~0\\\\|x.1+1.2+2.y-y.1-1.2-2.x|=0\\\\|x+2+2y-y-2-2x|=0\\\\|-x+y|=0\\\\-x+y=0\\\\x-y=0[/tex]
Resposta:
x - y = 0
Explicação passo-a-passo:
[tex]\left|\begin{array}{cccc}x&1&2&x\\y&1&2&y\end{array}\right|_{+} ^{-} = ~0\\\\|x.1+1.2+2.y-y.1-1.2-2.x|=0\\\\|x+2+2y-y-2-2x|=0\\\\|-x+y|=0\\\\-x+y=0\\\\x-y=0[/tex]