Question

gấp nha mấy bạn ơi

Answer 1

A=\(\left(x^2-2xy+y^2\right)-z^2\)

=\(\left(x-y\right)^2-z^2\)

=\(\left(x-y-z\right)\left(x-y+z\right)\)

Answer 2

\(x^2-2xy+y^2-z^2=\left(x-y\right)^2-z^2\)

\(=\left(x-y-z\right)\left(x-y+z\right)\)

Answer 3

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

Answer 4

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