/kaoyan/%E6%95%B0%E5%AD%A6/%E9%AB%98%E7%AD%89%E6%95%B0%E5%AD%A6/%E7%AC%AC4%E7%AB%A0%20%E5%BE%AE%E5%88%86%E6%96%B9%E7%A8%8B/%E7%9F%A5%E8%AF%86%E7%82%B9/4.4%20%E4%BA%8C%E9%98%B6%E5%BE%AE%E5%88%86%E6%96%B9%E7%A8%8B/ to /kaoyan/math/advanced-math/ch04-wei-fen-fang-cheng/knowledge/4.4-er-jie-wei-fen-fang-cheng