计算题:3x(x²-3x+2)-x²(3x-1)
问题描述:
计算题:3x(x²-3x+2)-x²(3x-1)
答
3x(x²-3x+2)-x²(3x-1)
=3x³-9x²+6x-3x³+x²
=-8x²+6x
=2x(3-4x)