x3+y3怎样化成(x+y)(x2-xy+y2)
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/03 07:45:07
x3+y3怎样化成(x+y)(x2-xy+y2)
x3+y3怎样化成(x+y)(x2-xy+y2)
x3+y3怎样化成(x+y)(x2-xy+y2)
x3+y3
=x³+x²y-x²y-xy²+xy²+y³
=x²(x+y)-xy(x+y)+y²(x+y)
=(x+y)(x²-xy+y²)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/05/03 07:45:07
x3+y3怎样化成(x+y)(x2-xy+y2)
x3+y3怎样化成(x+y)(x2-xy+y2)
x3+y3怎样化成(x+y)(x2-xy+y2)
x3+y3
=x³+x²y-x²y-xy²+xy²+y³
=x²(x+y)-xy(x+y)+y²(x+y)
=(x+y)(x²-xy+y²)