Twitter is great because of the way the conversation is open and available to all. If you have a question or query it's just so easy to tweet for the answer, but is this helping you?
At SecondTeacher.com we use twitter and facebook to try and get our product seen. So maybe me saying that twitter for homework help is a bad thing is a little hypocritical. Well what I'm saying is that just getting the answers from twitter is not to be encouraged.
If you just grab the answer to your math homework from twitter then you learn nothing except that using twitter is a shortcut to getting your homework done.
You should be using twitter and the wider internet to help you understand the concepts in your homework and not just the answers.
It's like the old saying "Give a man a fish and feed him for a day, teach a man to fish and feed him for life.". There is no quick fix here but I promise once you learn the concepts the answers will come much easier and you will progress in your math knowledge, copy down the answers and all you're doing is fooling yourself and limiting your future potential.
So yes use twitter for your math homework but use it to find good resources (like ours, shameless plug) and you will succeed.