Simplify (y-z)square -2yz?

1 Answer
Feb 19, 2018

y^2 - 4zy + z^2

Explanation:

(y-z)^2 = (y-z)(y-z)
If you expand this, you get: y^2 - zy - zy +z^2 or y^2 - 2zy + z^2
Then, add the -2yz into it and you get y^2 - 2zy - 2zy + z^2, which becomes y^2 - 4zy +z^2

Hope this helps!