Respuesta:
[tex](3m-n^{2} )^{2} \\=(3m+-n^{2} )(3m+-n^{2} )\\=(3m)(3m)+(3m)(-n^{2} )+(-n^{2} )(3m)+(-n^{2} )(-n^{2} )\\=9m^{2} -3mn^{2} -3mn^{2} +n^{4} \\=n^{4} -6mn^{2} +9m^{2} \\[/tex]
Explicación paso a paso:
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Respuesta:
[tex](3m-n^{2} )^{2} \\=(3m+-n^{2} )(3m+-n^{2} )\\=(3m)(3m)+(3m)(-n^{2} )+(-n^{2} )(3m)+(-n^{2} )(-n^{2} )\\=9m^{2} -3mn^{2} -3mn^{2} +n^{4} \\=n^{4} -6mn^{2} +9m^{2} \\[/tex]
Explicación paso a paso: