Question

All of the following expressions represent the sum of n and itself, except _____.

Answer 1

Answer: $n^{2}$

Step-by-step explanation:

(n + n) represents the definition of the sum of n and itself.

(2n) means two times n, wich is the same as adding n + n.

$n^{2}$ actually represents the multiplication of n two times: $n*n$

For example, if n=3:

$n+n=3+3=6$

$2n=2(3)=6$

$n^{2}=3^{2} =9$

Answer 2

N^2 because 2n is the same as n+n, but n^2 is the same as the product of n and n