x²-y²+x+y
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x²-y²+x+yx²-y²+x+yx²-y²+x+yx²-y²+x+y=(x²-y²)+(x+y)
x²-y²+x+y
x²-y²+x+y
x²-y²+x+y
x²-y²+x+y
=(x²-y²)+(x+y)
=(x+y)(x-y)+(x+y)
=(x+y) (x-y+1)
x²-y²+x+y
=(x+y)(x-y)+(x+y)
=(x+y)(x-y+1)
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来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/31 06:30:47
x²-y²+x+y
x²-y²+x+y
x²-y²+x+y
x²-y²+x+y
=(x²-y²)+(x+y)
=(x+y)(x-y)+(x+y)
=(x+y) (x-y+1)
x²-y²+x+y
=(x+y)(x-y)+(x+y)
=(x+y)(x-y+1)