Question

9（x-y）²-6（x-y)+1

因式分解，要有过程！谢谢啦

Answer 1

解：9（x-y）²-6（x-y)+1
=[3(x-y)-1]²
=(3x-3y-1)²

Answer 2

=(3(x-y)-1)^2
=(3x-3y-1)^2

Answer 3

解：原式=[3(x-y)-1]^2
=(3x-3y-1)^2