2x的三次方+3x的平方-1 因式分解

2025-02-25 19:03:51
推荐回答(1个)
回答1:

2x³+3x²-1=2x³+2x²+x²-1
=2x²﹙x+1﹚+﹙x+1﹚﹙x-1﹚
=﹙x+1﹚﹙2x²+x-1﹚
=﹙x+1﹚﹙x+1﹚﹙2x-1﹚
=﹙x+1﹚²﹙2x-1﹚