They are terms that can be simplified to: 6mn
6nm
12m + 2n - 3m + 11n = 9m + 13n
5m+2n, n-3m, 7-3n (5m+2n)+(n-3m)+(7-3n)=2m+7
sum = 2n + 3m
(3m+2n)(m+3n)
96m3
6(3m - 2n)(3m + 2n)
12m + 2n - 3m + 11n = 9m + 13n
5m+2n, n-3m, 7-3n (5m+2n)+(n-3m)+(7-3n)=2m+7
34
It can be simplified to: 4m-2n
18 - 16 = 2
3m*3m*2m=300*300*200=18,000,000cm3
sum = 2n + 3m
(3m+2n)(m+3n)
Work = (force) x (distance) (2 x 3) = (3 x 2) The work in the two cases described is equal. The answer is "no".
2n x 2n x 2n = 8n^3
The volume of a shape 3m x 3m x 2m is 18m3.