问题
解答题
(x+1)(x2+x+1)-(x-1)(x2-x+1)≥(4x+3)(x-2)
答案
整理得:x3+x2+x+x2+x+1-x3+x2-x+x2-x+1≥4x2-8x+3x-6,
移项合并得:5x≥-8,
解得:x≥-
.8 5
(x+1)(x2+x+1)-(x-1)(x2-x+1)≥(4x+3)(x-2)
整理得:x3+x2+x+x2+x+1-x3+x2-x+x2-x+1≥4x2-8x+3x-6,
移项合并得:5x≥-8,
解得:x≥-
.8 5