Hi guys, I started linear algebra just yesturday. I've read the first section of the first chapter and now I'm trying to do some problems from this section and I'm stuck on #7. I scanned the page from my math book (here's a link: http://img392.imageshack.us/img392/8476/lach11n72fb.jpg [Broken]). After reading this section of my book, I'm pretty sure I understand what an "augmented matrix" is. I understand what "consistent" means, and also understand the basic row operations. In an attempt to figure out what the question is asking, I wrote down their augmented matrix in equation form, and I wrote the following. y1 = ax1^2 + bx1 + c y2 = ax2^2 + bx2 + c y3 = ax3^2 + bx3 + c Even if this isn't in the right direction to solving the problem, did I do this correctly? I'm confused as to what exactly the question is asking, and what to "show". I've always been bad at the questions that ask to "show" something is true or false. Please help!