化简求值:¼xy²+(2x²y-1)-(½xy²+3/2x²y),其中X=-1,y=2
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 07:45:33
x){3g6yguE%6~è®5|SWX@Si';FT$|;R3آ_U.^V]4HQkyx H醇Tj6yv
化简求值:¼xy²+(2x²y-1)-(½xy²+3/2x²y),其中X=-1,y=2
化简求值:¼xy²+(2x²y-1)-(½xy²+3/2x²y),其中X=-1,y=2
化简求值:¼xy²+(2x²y-1)-(½xy²+3/2x²y),其中X=-1,y=2
:¼xy²+(2x²y-1)-(½xy²+3/2x²y)
=¼xy²+2x²y-1-½xy²-3/2x²y
=-¼xy²+1/2x²y-1
=-¼×(-1)×4+1/2×1×2-1
=1+1-1
=1