Respuesta:
2) ( 6n – 9 ) ( 5 – 4n )
3) ( 5x – 3n – 7x )2
4) ( 7a – 12 )2
5) ( m2 + m +1 ) ( m2 –m + 1 )
6) ( x + y ) ( x – y ) ( x2 + y2 )
7) ( 5m – 4n )2
8) ( 11 – 8y )2
Explicación paso a paso:
[tex]=\left(2m\:+\:3\right)^2\:+\:\left(2m\:-\:3\right)^2\\=\left(2m+3\right)^2+\left(2m-3\right)^2\\=4m^2+12m+9+4m^2-12m+9\\=8m^2+18\\\\\\=\left(m^2+4\right)^2-\left(m^2-4\right)^2\\=m^4+8m^2+16-m^4+8m^2-16\\\=16m^2\\\\= 8m^2+18-16m^2\\=-8m^2+18\\\\\\Rpta : -8m^2+18[/tex]
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Respuesta:
2) ( 6n – 9 ) ( 5 – 4n )
3) ( 5x – 3n – 7x )2
4) ( 7a – 12 )2
5) ( m2 + m +1 ) ( m2 –m + 1 )
6) ( x + y ) ( x – y ) ( x2 + y2 )
7) ( 5m – 4n )2
8) ( 11 – 8y )2
Explicación paso a paso:
2) ( 6n – 9 ) ( 5 – 4n )
3) ( 5x – 3n – 7x )2
4) ( 7a – 12 )2
5) ( m2 + m +1 ) ( m2 –m + 1 )
6) ( x + y ) ( x – y ) ( x2 + y2 )
7) ( 5m – 4n )2
8) ( 11 – 8y )2
[tex]=\left(2m\:+\:3\right)^2\:+\:\left(2m\:-\:3\right)^2\\=\left(2m+3\right)^2+\left(2m-3\right)^2\\=4m^2+12m+9+4m^2-12m+9\\=8m^2+18\\\\\\=\left(m^2+4\right)^2-\left(m^2-4\right)^2\\=m^4+8m^2+16-m^4+8m^2-16\\\=16m^2\\\\= 8m^2+18-16m^2\\=-8m^2+18\\\\\\Rpta : -8m^2+18[/tex]