It could be an answer but judging whether it is a good answer or not is subjective and will be different for every user. My best advice is : try.
Short answers tend to be deleted because they often show a lack of effort and could be just as useful as comments. These short answers are fine as long as they do answer the question, but 1 or 2 lines of texts is not always enough to fully develop an idea: that's usually the problem when they get flagged. Long answers are less likely to be considered useless. I have different theories about why these are more acceptable but I think I don't need to get into this now.
The other point is about the content of the answer. The content could be similar to another post but it would have to bring something new in order to be considered useful. A new element, a new perspective... otherwise it's could be considered a form of plagiarism :(