Answer
$0$
Work Step by Step
Our aims is to compute the dot product , for this we will multiply the corresponding components together and then add.
In general, we have the formula as: $ \lt a , b\gt \cdot \lt c, d \gt =ac+bd$
Therefore,
$ \lt 7, -2 \gt \cdot \lt 4, 14 \gt = (7)(4)+(-2)(14)=28-28=0$
