因式分解:(x-y)的平方-8(x-y-2)等于?

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因式分解:(x-y)的平方-8(x-y-2)等于?因式分解:(x-y)的平方-8(x-y-2)等于?因式分解:(x-y)的平方-8(x-y-2)等于?(x-y)^2-8(x-y-2)=(x-y)^2-

因式分解:(x-y)的平方-8(x-y-2)等于?
因式分解:(x-y)的平方-8(x-y-2)等于?

因式分解:(x-y)的平方-8(x-y-2)等于?
(x-y)^2-8(x-y-2)
=(x-y)^2-8(x-y)+16
=[(x-y)-4]^2
=(x-y-4)^2

前面(x-y)乘(x-y)
得出来一个 然后 - 8X+8Y+16
就行了啊

(x-y+4)的平方