Find the reflection of $\begin{pmatrix} -2 \\ 3 \end{pmatrix}$ over the vector $\begin{pmatrix} 2 \\ 1 \end{pmatrix}.$
Question:
Find the reflection of $\begin{pmatrix} -2 \\ 3 \end{pmatrix}$ over the vector $\begin{pmatrix} 2 \\ 1 \end{pmatrix}.$
Answer:
Let's think step by step.

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\begin{pmatrix} 6/5 \\ -17/5 \end{pmatrix}
Find the reflection of $\begin{pmatrix} -2 \\ 3 \end{pmatrix}$ over the vector $\begin{pmatrix} 2 \\ 1 \end{pmatrix}.$
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