Question

De m-n+p restar a suma de -m+n-p con 2m-2n+2p

Answer 1

[(-m+n-p)+(2m-2n+2p)]-(m-n+p)=
(m-n+p)-(m-n+p)=
m-n+p-m+n-p=
(m-m)+(-n+n)+(p-p)=
(0)+(0)+(0)=
0