Prove geometric results with vectors - visual final review
In a parallelogram proof, \(|\mathbf{a}|=5\), \(|\mathbf{b}|=9\), and \(\mathbf{a}\cdot\mathbf{b}=7\). Enter \(|\mathbf{a}+\mathbf{b}|^{2}\).
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Worked practice: result and interpretation
Calculate the requested result first, then choose the interpretation that follows from it.