数学,先化简,再求值,详细过程1/2x-2(x-1/3y²)+(-3/2x+1/3y²),其中x=-2,y=1/3

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 08:06:07
数学,先化简,再求值,详细过程1/2x-2(x-1/3y²)+(-3/2x+1/3y²),其中x=-2,y=1/3数学,先化简,再求值,详细过程1/2x-2(x-1/3y²

数学,先化简,再求值,详细过程1/2x-2(x-1/3y²)+(-3/2x+1/3y²),其中x=-2,y=1/3
数学,先化简,再求值,详细过程
1/2x-2(x-1/3y²)+(-3/2x+1/3y²),其中x=-2,y=1/3

数学,先化简,再求值,详细过程1/2x-2(x-1/3y²)+(-3/2x+1/3y²),其中x=-2,y=1/3
1/2x-2(x-1/3y²)+(-3/2x+1/3y²)
=1/2x-2x+2/3y²-3/2x+1/3y²
=-3x+y²
=-3×(-2)+(1/3)²
=6+1/9
=6又1/9

1/2x-2(x-1/3y²)+(-3/2x+1/3y²)
=1/2x-2x+2/3y²-3/2x+1/3y²
=(1/2-3/2)x+(2/3+1/3)y²
=-x+y²
=-(-2)+(1/3)²
=2+1/9
=19/9

简单