Answer
$P(7,2) = {7 \choose 2}*2!$
Work Step by Step
The number of ways to permute 2 elements is the same as the number of ways to choose the elements and then order them. Therefore, we can say that $P(7,2)$ is $7 \choose 2$ multiplied by the number of ways to order the 2 elements, or $2! = 2$.
