Respuesta:
-2xy
porque signos difrentes se restan y se pone el signo mayor :D
[tex]\left(2x-y\right)^2-4x^2-y^2[/tex]
[tex]4x^2-4xy+y^2-4x^2-y^2[/tex]
[tex]-4xy[/tex]
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Respuesta:
-2xy
porque signos difrentes se restan y se pone el signo mayor :D
[tex]\left(2x-y\right)^2-4x^2-y^2[/tex]
[tex]4x^2-4xy+y^2-4x^2-y^2[/tex]
[tex]-4xy[/tex]