(1/2x+1/3y)²-(1/2x-1/3y)²

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/14 22:42:28
(1/2x+1/3y)²-(1/2x-1/3y)²

(1/2x+1/3y)²-(1/2x-1/3y)²
(1/2x+1/3y)²-(1/2x-1/3y)²

(1/2x+1/3y)²-(1/2x-1/3y)²
(1/2x+1/3y)²-(1/2x-1/3y)²
=(1/2x+1/3y+1/2x-1/3y)(1/2x+1/3y-1/2x+1/3y)
=x*2/3y
=2/3xy
如果本题有什么不明白可以追问,