The heights of two trees are x and y where `x gt y` . The tops of the trees are at a distance z apart. If s in the shortest distance between the trees, then what is `s^(2)` equal to ?

Options

A. `x ^(2) - y ^(2) - z ^(2) - 2 xy`
B. `x ^(2) + y ^(2) - z ^(2)`
C. `x ^(2) + y ^(2) + z ^(2) - 2 xy`
D. ` z ^(2) -x ^(2) - y ^(2) + 2 xy`

Answer

D