x²-y²-3x-3y
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x²-y²-3x-3yx²-y²-3x-3yx²-y²-3x-3y=(x+y)(x-y)-3(x+y)=(x+y)(x-y-3)希望能帮你忙
x²-y²-3x-3y
x²-y²-3x-3y
x²-y²-3x-3y
=(x+y)(x-y)-3(x+y)
=(x+y)(x-y-3)
希望能帮你忙,懂了请采纳,
x²-y²-3x-3y=(x+y)(x-y)-3(x+y)=(x+y)(x-y-3)
x²-y²-3x-3y
=(x+y)(x-y)-3(x+y)
=(x+y)(x-y-3)