问题描述: 解方程:(x+1)(x²+x+1)-(x-1)(x²-x+1)=(4x+3)(x-2)快. 1个回答 分类:数学 2014-10-13 问题解答: 我来补答 (x+1)(x²+x+1)-(x-1)(x²-x+1)=(4x+3)(x-2)(x+1)(x²-x+1+2x)-(x-1)(x²+x+1-2x)=(4x+3)(x-2)(x+1)(x²-x+1)+2x(x+1)-(x-1)(x²+x+1)+2x(x-1)=(4x+3)(x-2)x^3+1+2x(x+1)-(x^3-1)+2x(x-1)=(4x+3)(x-2)x^3+1+2x(x+1)-x^3+1+2x(x-1)=(4x+3)(x-2)2x(x+1)+2x(x-1)+2=(4x+3)(x-2)2x(x+1+x-1)+2=(4x+3)(x-2)4x^2+2=4x^2-5x-62=-5x-65x=-8x=-8/5 展开全文阅读