x虏-y虏+y-1/4 答案网 2021-07-01 阅读(3) x虏-y虏+y-1/4 问题描述:x虏-y虏+y-1/4最佳答案: x² -y² +y-1/4=x² -(y-1/2)² =(x+y-1/2)(x-y+1/2)如果本题有什么不明白可以追问,