x减y的平方减x加y如何因式分解

2024-11-17 19:20:43
推荐回答(1个)
回答(1):

1-x^2+2xy-y^2 =1-(x^2-2xy+y^2) =1-(x-y)^2 =[1-(x-y)][1+(x-y)] =(1-x+y)(1+x-y)