Đáp án + Giải thích các bước giải:

`Z³` `-` `3Z²` `+` `3Y²` `+` `Y³` 

`=` `( Z³ + Y³ )` `-` `( 3Z² - 3Y² )` 

`=` `( Z + Y )``( Z² - ZY + Y² )` `-` `3( Z² - Y² )

`=` `( Z + Y )``( Z² - ZY + Y² )` `-` `3( Z - Y )``( Z + Y )` 

`=` `( Z + Y )``[( Z² - ZY + Y² ) - 3( Z - Y )]` 

`=` `( Z + Y )``[ Z² - ZY + Y² - 3Z + 3Y ]`

quất gửi :Đ

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