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The heights of two trees are x and y whe...

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 ?

A

`x^(2)+y^(2)-z^(2)-2xy`

B

`x^(2)+y^(2)-z^(2)`

C

`x^(2)+y^(2)+z^(2)-2xy`

D

`z^(2)-x^(2)-y^(2)+2xy`

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