Question

Help would be great thank you!

Answer 1

I think 3x doesn't belong because it is the only positive number.

I think -5x doesn't belong because it is the only one without a 3.

I think -3 doesn't belong because it is the only one without an x.

I think -3x² doesn't belong because it is the only one with an exponent.

Explanation:

Just use one of the ones above!

(hope this helps!)