Unknown brand mathematical equations

The image displays handwritten mathematical equations on a piece of grid paper. It does not contain a commercial product, brand name, or packaging. The equations shown are quadratic equations: $x^2 + 2x + 1 = 0$ and $x^2 + x + 1 = 0$. Because this is personal handwriting and not a retail item, there is no manufacturing country, brand origin, or corporate ownership associated with the content of the image. It likely represents educational notes or a student's homework exercise.