Hello! I just have a quick question... 

In the video lesson/lecture number 2 (the one after the sample video), page 19 in the textbook file, 32:25 in the video time, and on question 5, the answer in the lecture was -2 - √2 < x < -2 + √2. I do not quite get why the inequality symbol is a less than sign because the question given was x^2 + 4x + 2 <= 0, where the inequality symbol is least than or equal to. I think x can be both -2 - √2 & -2 + √2 because it full fills the equation used to solve it.

Thank you!