Question

Add (n^3 + 2n) + (2n6^3-n)

a) n^3 + 4n
b) 4n^3
c) 3n^3+ n
d) 3n^3-n

Answer 1

Combine like terms


So

n^3+2n^3 = 3n^3

and

2n+(-n) = 2n-n = n


Which means that the final answer is 3n^3 + n