对下面的四个式子进行因式分解1.(x+y)(x-y)-(x+y)² 2.x(x-y)-y(y-x) 3.(x-y)²-4b(y-x) 4.a(x-a)(x+y)²-b(x-a)²(x+y)
问题描述:
对下面的四个式子进行因式分解
1.(x+y)(x-y)-(x+y)²
2.x(x-y)-y(y-x)
3.(x-y)²-4b(y-x)
4.a(x-a)(x+y)²-b(x-a)²(x+y)
答