1. The problem statement, all variables and given/known data Hey I have a question that I have to do that involves expanding a cubic. It is given in the form y = , once it is found I have to square it and then substitute it into a formula to find the area. All I need help with is the expansion than after that it's quite easy. 2. Relevant equations Sorry I don't know how to use the options here to create formulas etc. But I hope the following link works. https://www.physicsforums.com/attachment.php?attachmentid=58828&stc=1&d=1368927170 This is the equation that I need to expand. 3. The attempt at a solution I know how to expand a cubic already, it's not that difficult. The problem is with the +2 at the end of the equation. Do I ignore it, expand the brackets and add it on at the end?