(2x-1)(x+2)-(2x+1)²+2x(x-8),其中x=-1
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/26 06:25:28
(2x-1)(x+2)-(2x+1)²+2x(x-8),其中x=-1(2x-1)(x+2)-(2x+1)²+2x(x-8),其中x=-1(2x-1)(x+2)-(2x+1)
(2x-1)(x+2)-(2x+1)²+2x(x-8),其中x=-1
(2x-1)(x+2)-(2x+1)²+2x(x-8),其中x=-1
(2x-1)(x+2)-(2x+1)²+2x(x-8),其中x=-1
(2x-1)(x+2)-(2x+1)²+2x(x-8),
=2x²-x+4x -2 -4x²-4x-1+2x²-16x
= -17x -3
其中x=-1
= 17 -3
=14
(2x-1)(x+2)-(2x+1)²+2x(x-8)
=2x-1-1-2(x-8)
=2x-2-2x+16
=14
(2x-1)(x+2)-(2x+1)²+2x(x-8)
=2x²+3x-2-4x²-4x-1+2x²-16x
=-17x-3
=17-3
=14