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简化 x2 + -2x + 6 + 2x + 5 = 0 重新排序条件: 6 + 5 + -2x + 2x + x2 = 0 结合相似条件: 6 + 5 = 11 11 + -2x + 2x + x2 = 0 结合相似条件: -2x + 2x = 0 11 + 0 + x2 = 0 11 + x2 = 0 解: 11 + x2 = 0 求解变量 'x'. 移动所有含x 的放右边,所有其它条件放左边. 增加 '-11' 到方程的每一侧. 11 + -11 + x2 = 0 + -11 结合相似条件: 11 + -11 = 0 0 + x2 = 0 + -11 x2 = 0 + -11 结合相似条件: 0 + -11 = -11 x2 = -11 简化 x2 = -11 重新排序条件: 11 + x2 = -11 + 11 结合相似条件: -11 + 11 = 0 11 + x2 = 0 无法确定此方程的解.
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