化简求值:2x²(x²-x-1)-x(2x³-10x²-2x-3)其中x=-1/2

问题描述:

化简求值:2x²(x²-x-1)-x(2x³-10x²-2x-3)其中x=-1/2

2x²(x²-x-1)-x(2x³-10x²-2x-3)
=2x ⁴-2x³-2x²-2x ⁴+10x³+2x²+3x
=8x³+3x
=8*(-1/8)+(-3/2)
=-5/2
【数学辅导团】为您解答,