Question

(2m + 5n - 1)(m + n)​

Answer 1

$Respuesta:$

$\left(2m+5n-1\right)\left(m+n\right)=\quad 2m^2+7mn+5n^2-m-n$

$Explicacion \ paso \ a \ paso:$

$\left(2m+5n-1\right)\left(m+n\right)$

$\mathrm{Aplica\:la\:siguiente\:regla\:de\:productos\:notables}$

$=2mm+2mn+5nm+5nn+\left(-1\right)m+\left(-1\right)n$

$\mathrm{Aplica\:las\:reglas\:de\:los\:signos}$

$=2mm+2mn+5mn+5nn-1\cdot \:m-1\cdot \:n$

$\mathrm{Simplifica}\:2mm+2mn+5mn+5nn-1\cdot \:m-1\cdot \:n:\quad 2m^2+7mn+5n^2-m-n$

$=2m^2+7mn+5n^2-m-n$

$Realizado \ por \ Jonnathan896$