3(x²-y²)-1/2(xy-y)²化简

来源：学生作业帮助网编辑：六六作业网时间：2024/12/21 23:34:04

3(x²-y²)-1/2(xy-y)²化简3(x²-y²)-1/2(xy-y)²化简3(x²-y²)-1/2(xy-y)

3(x²-y²)-1/2(xy-y)²化简
3(x²-y²)-1/2(xy-y)²化简

3(x²-y²)-1/2(xy-y)²化简
3(x²-y²)-1/2(xy-y)²
=3x²-3y²-1/2(x²y²-2xy²+y²)
=3x²-3y²-(½)x²y²+xy²-(½)y²
=3x²-(7/2)y²-(½)x²y²+xy²