1. The problem statement, all variables and given/known data How many points of intersection does the line y = x have with the parabola y = 6x − x2 −10 ? A) none B) one C) two D) three E) more than three 2. Relevant equations 3. The attempt at a solution x = 6x - x^2 - 10 -x^2+5x - 10 Used b^2 - 4ac to check the number of intersections. The answer I got is . However my teacher marked it as incorrect. I still cannot find the problem, please help. If my teacher marked it wrong, please tell me so because I think he did. Thanks.