Question

3. Factorise the following:
a) (x2 – 2xy + y2) – zz​

Answer 1

Answer:

(x-y-z)(x-y+z)

Step-by-step explanation:

x2-2xy+y2=(x-y)^2

zz=z^2

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