题目

Each different part of China has its own special forms of traditional art. These usually try to represent the things that are important in life such as love, beauty and family. The most common things, from paper to clay to bamboo, are turned into o【1】 of beauty.According to Chinese history, sky lanterns were f【2】 used by Zhuge Kongming. He sent them out to ask for help when in trouble. Today, sky lanterns are used at festivals and other celebrations. They are m【3】 of bamboo and covered with paper. When the lanterns are lit, they slowly rise into the air like small hot-air balloons 因式分解：（1）x5-x=______；（2）4（a+b）2-16ab=______．