(y+3)²(y-3)²等于几(过程也要)急!

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/03 05:38:45

(y+3)²(y-3)²等于几(过程也要)急!
(y+3)²(y-3)²等于几(过程也要)急!

(y+3)²(y-3)²等于几(过程也要)急!
(y+3)²(y-3)²
=[(y+3)(y-3)]²
=(y²-9)²
=y^4-18y²+81