1. The problem statement, all variables and given/known data Show the origin is the only critical point 2. Relevant equations x'= -x-x3 y-= -y-y5 3. The attempt at a solution I'm not really sure how to go about this. I missed a few lectures due to a medical issue, and now were at the end of the semester and I can't get in touch with the professor. Any help would be appreciated.