Can I post the same question to other newsgroups in addition to alt.algebra.help?

Of course, assuming the subject matter is on-topic for the other newsgroups (consult the FAQ or charter for the other newsgroups to see.) There is, however, a right way and a wrong way to go about it. The wrong way is to send separate posts to each newsgroup. The right way is to ``cross-post,'' meaning to include all the newsgroups on the Newsgroups: line of a single post. By cross-posting, replies in one newsgroup will automatically be sent by default to all the other newsgroups the original post was addressed to. If you don't cross-post but instead send separate posts to each newsgroup, a reply in one newsgroup is posted just to that newsgroup and not the others. This is considered poor netiquette, so please don't do it. Although it may not bother the original poster, it can be a big inconvenience for those replying to the post. It can be very frustrating taking the time and effort to post a detailed response, only to learn later the question has already been answered basically the same way in another newsgroup (perhaps the person does not subscribe to all the newsgroups). This situation can be avoided by properly cross-posting your question. It's better for the original poster too, since he need follow only one of the newsgroups to see the responses from all of the newsgroups.

Also, you should cross-post to only a very few newsgroups (say, two or three.) Addressing too many newsgroups may result in the post being filtered out by way of a personal killfile or similar mechanism (for instance, a spam filter at the server level).