什么是同类二次根式

{"name":"\u4ec0\u4e48\u662f\u540c\u7c7b\u4e8c\u6b21\u6839\u5f0f","type":"\u9b54\u5e7b\u5267","area":"\u4fc4\u7f57\u65af","year":"1994","lang":"\u82f1\u8bed","play":"4K\u8d85\u6e05","type1":"\u9b54\u5e7b\u5267"}