计算题:(x+y+1)²-(x+y-1)²

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/22 11:31:40
计算题:(x+y+1)²-(x+y-1)²计算题:(x+y+1)²-(x+y-1)²计算题:(x+y+1)²-(x+y-1)²:(x+y+1

计算题:(x+y+1)²-(x+y-1)²
计算题:(x+y+1)²-(x+y-1)²

计算题:(x+y+1)²-(x+y-1)²
:(x+y+1)²-(x+y-1)² 平方差公式
=(x+y+1-x-y+1)(x+y+1+x+y+1)
=2(2x+2y)
=4x+4y

如有不明白,可以追问
如有帮助,记得采纳,谢谢

0