问题
解答题
2(x-1)(x+2)(x2-3)
答案
原式=2(x2+2x-x-2)(x2-3)
=2(x2+x-2)(x2-3)
=2(x4-3x2+x3-3x-2x2+6)
=2(x4+x3-5x2-3x+6)
=2x4+2x3-10x2-6x+12.
2(x-1)(x+2)(x2-3)
原式=2(x2+2x-x-2)(x2-3)
=2(x2+x-2)(x2-3)
=2(x4-3x2+x3-3x-2x2+6)
=2(x4+x3-5x2-3x+6)
=2x4+2x3-10x2-6x+12.