问题描述: 因式分解 (a+b)²-1 -(x+2)²+16(x-1)² (3x+2y)²-(x-y)² 1个回答 分类:数学 2014-09-19 问题解答: 我来补答 (a+b)²-1=(a+b+1)(a+b-1)-(x+2)²+16(x-1)²=[4(x-1)+(x+2)][4(x-1)-(x+2)]=(4x-4+x+2)(4x-4-x-2)=(5x-2)(3x-6)=3(x-2)(5x-2)(3x+2y)²-(x-y)²=[(3x+2y)+(x-y)][(3x+2y)-(x-y)]=(3x+2y+x-y)(3x+2y-x+y)=(4x+y)(2x+3y) 展开全文阅读