Question 1202a

Vectors I: Basics, Dot and Cross Products
Scalar (Dot) Product

Question

What is
(−2−1−2)⋅(−21−1)?\begin{pmatrix} - 2 \\ - 1 \\ - 2 \end{pmatrix} \cdot \begin{pmatrix} - 2 \\ 1 \\ - 1 \end{pmatrix}?

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