Question

Factorise


(x +y + 2)² + (x+y-z)^2?​

Answer 1

Step-by-step explanation:

Note that (x-y) ² = (y-x) ²

(Why?

Hint : (-1) ²= 1)

So:

(x-y) ² + (y-x) ² = 2 * (x-y) ²

Or, also: 2*(y-x) ²

Factorization:

2 * (x-y) * (x-y)