计算[(x+y)²—(x—y)²]÷4xy(过程要)
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/24 23:26:58
计算[(x+y)²—(x—y)²]÷4xy(过程要)计算[(x+y)²—(x—y)²]÷4xy(过程要)计算[(x+y)²—(x—y)²]÷
计算[(x+y)²—(x—y)²]÷4xy(过程要)
计算[(x+y)²—(x—y)²]÷4xy(过程要)
计算[(x+y)²—(x—y)²]÷4xy(过程要)
=[x²+2xy+y²-(x²-2xy+y²)]÷4xy
=4xy÷4xy
=1