Respuesta:
[tex]-x2 + y2 + z2 + 2x2 - y2 + z2:2z^{2}+x^{2}[/tex]
Explicación paso a paso:
[tex]=z^2+z^2-y^2+y^2+2x^2-x^2\\\\=z^2+z^2+2x^2-x^2\\\\=2z^2+2x^2-x^2\\\\=2z^2+x^2[/tex]
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Respuesta:
[tex]-x2 + y2 + z2 + 2x2 - y2 + z2:2z^{2}+x^{2}[/tex]
Explicación paso a paso:
[tex]=z^2+z^2-y^2+y^2+2x^2-x^2\\\\=z^2+z^2+2x^2-x^2\\\\=2z^2+2x^2-x^2\\\\=2z^2+x^2[/tex]