求值:x²(x-1)-x(x²+x-1),其中x=1/2

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/23 16:39:11
求值:x²(x-1)-x(x²+x-1),其中x=1/2求值:x²(x-1)-x(x²+x-1),其中x=1/2求值:x²(x-1)-x(x²

求值:x²(x-1)-x(x²+x-1),其中x=1/2
求值:x²(x-1)-x(x²+x-1),其中x=1/2

求值:x²(x-1)-x(x²+x-1),其中x=1/2
原式=x³-x²-x³-x²+x
=-2x²+x
当x=1/2时
原式=-2×(1/2)²+1/2
=-1/2+1/2
=0


x²(x-1)-x(x²+x-1)
=x³-x²-x³-x²+x
=-2x²+x
=-2×(1/4)+1/2
=-1/2+1/2
=0

x²(x-1)-x(x²+x-1)
=x³-x²-x³-x²+x
=-2x²+x
=-2×1/4+1/2
=-1/2+1/2
=0