Question

thanks, now I have a second question. please factorize: (x2 - 2xy+y2) - z2

Answer 1

= (x-y)^2 - z^2
which could be further factored to
(x-y-z)(x-y+z)

Answer 2

= (x - y)² - z²
= [(x-y) + z][(x-y) - z]
= (x - y + z) (x - y - z)

Answer 3

johny, but my question is (x2-2xy+y2)-z2

Answer 4

thanks, got it.

Answer 5

then click GOOD ANSWER button pls...☺