Question

All of the following are equivalent, except _____.

A)2x + x
B)x(2 + 1)
C)2x²
D)3x

Answer 1

C) 2x^2 is NOT equivalent to the following. 

Answer 2

Answer:
C) 2x^2

Step-by-step explanation:
The easiest way is to evaluate all the given choices and then pick the odd one.
First choice:
2x + x = 3x .........> I
Second choice:
x(2+1) = 2x + x = 3x ...............> II
Third choice:
2x^2 ..............> III
Fourth choice:
3x ...........> IV

From the above, we can note that:
Expressions I,II and IV are equal whereas III is the odd one
Besides, the third choice is a the only one that is has x^2

Therefore, the third choice is not equivalent to the others

Hope this helps :)