已知x-y=负三分之二,求(x²+y²)²-4xy(x²+y²)+4x²y²的值
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![已知x-y=负三分之二,求(x²+y²)²-4xy(x²+y²)+4x²y²的值](/uploads/image/z/2545466-50-6.jpg?t=%E5%B7%B2%E7%9F%A5x%EF%BC%8Dy%EF%BC%9D%E8%B4%9F%E4%B8%89%E5%88%86%E4%B9%8B%E4%BA%8C%2C%E6%B1%82%EF%BC%88x%26%23178%3B%EF%BC%8By%26%23178%3B%EF%BC%89%26%23178%3B%EF%BC%8D4xy%EF%BC%88x%26%23178%3B%EF%BC%8By%26%23178%3B%EF%BC%89%EF%BC%8B4x%26%23178%3By%26%23178%3B%E7%9A%84%E5%80%BC)
已知x-y=负三分之二,求(x²+y²)²-4xy(x²+y²)+4x²y²的值
已知x-y=负三分之二,求(x²+y²)²-4xy(x²+y²)+4x²y²的值
已知x-y=负三分之二,求(x²+y²)²-4xy(x²+y²)+4x²y²的值
就是(x-y)四次方,答案就是16/81
(x²+y²)²-4xy(x²+y²)+4x²y²
=(x²+y²-2xy)²
=(x-y)^4
八十一分之十六