(x-y)²-x+y 因式分解 老师咋算
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(x-y)²-x+y因式分解老师咋算(x-y)²-x+y因式分解老师咋算(x-y)²-x+y因式分解老师咋算(x-y)²-x+y=(x-y)²-(x-
(x-y)²-x+y 因式分解 老师咋算
(x-y)²-x+y 因式分解 老师咋算
(x-y)²-x+y 因式分解 老师咋算
(x-y)²-x+y
=(x-y)²-(x-y)
=(x-y)(x-y-1)
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