Question

[9m (2mn – 4m + 6n) – m (-7mn – 20mn)] + 3mn -5 =​

Answer 1

Respuesta:

♫HOLA♫

Solución:

$=[9m (2mn -4m + 6n) - m (-7mn - 20mn)] + 3mn -5\\\\=(18m^{2} n-36m^{2} +54mn-m.(-27mn))+3mn-5\\\\=(18m^{2} n-36m^{2} +54mn+27m^{2} n)+3m5\\\\=(45m^{2}n-36m^{2} +54mn)+3mn-5\\\\=45m^{2}n-36m^{2}+54mn+3mn-5\\\\=45m^{2} n-36m^{2} +57mn-5$

Rpta: sale $45m^{2} n-36m^{2} +57mn-5$

Explicación paso a paso:

Espero que te ayude :) ♫