- #1

ccmetz2020

- 15

- 0

## Homework Statement

Prove that |X+Y|^2 - |X-Y|^2 = 4X(dot)Y using general properties of vectors.

## Homework Equations

???

## The Attempt at a Solution

I'm very confused about how to start this. If someone could give me some help to just get me started then that would hopefully get the ball rolling for me. Thanks!