I have a number of problems based on saving formulas in a ti89 I have tried a lot to solve them myself but in vain. Our teacher has asked us to solve them out ourselves and then explain them to the whole class. I fear that I will be chosen to do so. Please guide me!

You can find numerous links on the internet if you google the keyword saving formulas in a ti89. Most of the content is however crafted for the people who already have some know how about this subject. If you are a complete novice, you should use Algebrator. Is it easy to understand and very helpful too.

When I was in college, I faced similar problems with algebraic signs, relations and adding functions. But this wonderful Algebrator helped me through all my Intermediate algebra, Basic Math, and College Algebra. I simply typed in a problem from my workbook, and step by step solution to my algebra homework would appear on the screen by clicking on Solve. I truly recommend the Algebrator.