The diagram above represents a vector. The arrow displays its direction, hence this vector can be written as \(\overrightarrow {AB}\), a, or \(\begin{pmatrix} 3 \\ 4 \end{pmatrix}\). In print ...

Subtracting a vector is the same as adding a negative version of the vector (remember that making a vector negative means reversing its direction). \(\left( \begin{array}{l} a\\ b \end{array} ...