已知x^2+y^2+5=2x+4y,求代数式[2x^2-(x+y)(x-y)][(x+y-1)(x-y-1)+1-2y]的值. 会给好评哦

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已知x^2+y^2+5=2x+4y,求代数式[2x^2-(x+y)(x-y)][(x+y-1)(x-y-1)+1-2y]的值.会给好评哦已知x^2+y^2+5=2x+4y,求代数式[2x^2-(x+y

已知x^2+y^2+5=2x+4y,求代数式[2x^2-(x+y)(x-y)][(x+y-1)(x-y-1)+1-2y]的值. 会给好评哦
已知x^2+y^2+5=2x+4y,求代数式[2x^2-(x+y)(x-y)][(x+y-1)(x-y-1)+1-2y]的值. 会给好评哦