作业帮已知x²-4x-1=0,求代数式(2x-3)²-(x+y)(x-y)-y²求大神帮忙 已知x²-4x-1=0,求代数式(2x-3)²-(x+y)(x-y)-y²求大神帮忙
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已知x²-4x-1=0,求代数式(2x-3)²-(x+y)(x-y)-y²求大神帮忙 已知x²-4x-1=0,求代数式(2x-3)²-(x+y)(x-y)-y²求大神帮忙
已知x²-4x-1=0,求代数式(2x-3)²-(x+y)(x-y)-y²求大神帮忙
已知x²-4x-1=0,求代数式(2x-3)²-(x+y)(x-y)-y²求大神帮忙
已知x²-4x-1=0,求代数式(2x-3)²-(x+y)(x-y)-y²求大神帮忙 已知x²-4x-1=0,求代数式(2x-3)²-(x+y)(x-y)-y²求大神帮忙
