Hey everyone, I'm a new Calculus student, and this problem on derivatives is giving me lots of trouble. I can't get around it! Please help. 1. The problem statement, all variables and given/known data Find the coordinates of all points on the graph of y=1-x^2 at which the tangent line passes through the point (2,0). 2. Relevant equations Possibly anything related to derivatives and slope, such as: y-y1 = m(x-x1) The power rule: nx^(n-1) 3. The attempt at a solution All I know is the answer is: 2 (plus or minus) squareroot(3) I took the derivative of the original equation in the hopes that I might see where I should be going, but I'm just stuck. I don't see where the point comes in. If someone could tell me the steps of how to get the answer so I could use that knowledge in the future, I'd really appreciate it!