\beginpmatrix 2 \\ x \\ -3 \endpmatrix \cdot \beginpmatrix 4 \\ -1 \\ 1 \endpmatrix = 2 \cdot 4 + x \cdot (-1) + (-3) \cdot 1 = 8 - x - 3 = 5 - x - AMAZONAWS 📅 March 6, 2026 👤 scraface Mar 06, 2026