1.

chán z:")

on fb đi e=)))

` a) ( x^2 - 2x + 1 ) ( x - 1 ) `

`= x^3 - x^2 - 2x^2 + 2x + x - 1 `

`= x^3 - 3x^2 + 3x - 1 `

cop mạng tham khảo vào bạn nhé !

https://sachgiaibaitap.com/sach_giai/giai-bai-tap-sach-hoc-sinh-tu-nhien-xa-hoi-lop-2-kntt-bai-30-luyen-tap-ung-pho-voi-thien-tai/#gsc.tab=0