Final answer:
Due to the unclear nature of the question combining different mathematical concepts, a concrete answer cannot be given without further clarification.
Step-by-step explanation:
The student's question seems to involve finding a particular value for a variable or a constant in a quadratic equation, as well as understanding various other algebraic and vector concepts. However, the question as it is presented is a bit unclear and seems to have mixed different exercises or examples together. Due to the typos or irrelevant parts of the question, it is difficult to provide a specific answer in 200 words without further clarification from the student.
Looking at the examples provided, such as solving a quadratic equation or determining the volume of a parallelepiped using vector cross products, the student might need assistance with problems similar to these. For example, the quadratic equation x² +0.0211x -0.0211 = 0 can be solved using the quadratic formula where a=1, b=0.0211, and c=-0.0211. Similarly, for finding the volume of a parallelepiped given vectors, the student would need to find the scalar triple product of those vectors.
Each concept outlined relates to different algebraic and vector operations that are typically taught in high school mathematics courses, including quadratic equations, vector cross products, and exponent rules.