Question

which of the following is an equivalent expression? -2m(m+n-4)+5(-2m+2n)+n(m+4n-5)

Answer 1

Answer:

$-2m^2-mn-2m+5n+4n^2$

Step-by-step explanation:

$-2m(m+n-4)+5(-2m+2n)+n(m+4n-5)\\=-2m^2-2mn+8m-10m+10n+mn+4n^2-5n\\=-2m^2-2mn+mn+8m-10m+10n-5n+4n^2\\=-2m^2-mn-2m+5n+4n^2$