Question

Subtract 3mn (m - n) from 2mn (m + n).​

Answer 1

$\longrightarrow\sf{[ 2mn ( m + n )] - [ 3mn ( m - n )]}$

$\longrightarrow\sf{2{m}^{2}n + 2m{n}^{2} - ( 3{m}^{2}n - 3m{n}^{2})}$

$\longrightarrow\sf{2{m}^{2}n + 2m{n}^{2} - 3{m}^{2}n + 3m{n}^{2}}$

$\longrightarrow\sf{2{m}^{2}n - 3{m}^{2}n + 2m{n}^{2} + 3m{n}^{2}}$

$\longrightarrow\sf{- 1{m}^{2}n + 5m{n}^{2} }$

Answer 2

Answer:

(a+b)3 = a3 + 3a®2b + 3 ab®2 + b®3

(a+b)®3 = a®3 - 3a®2b + 3ab®2-b®3

(m-n) - (m+n)

Step-by-step explanation:

This much i know please take advice from your friends O:-)