Question

How do you factor `x^2 - y^2 + z^2 - 2xz`?

Answer 1

It is

#x^2 - y^2 + z^2 - 2xz=(x^2-2xz+z^2)-y^2= (x-z)^2-y^2=(x-z+y)*(x-z-y)#