(x+y)²-(x³+y³)÷(x+y)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 15:51:31
![(x+y)²-(x³+y³)÷(x+y)](/uploads/image/z/8732707-43-7.jpg?t=%28x%2By%29%26%23178%3B-%28x%26%23179%3B%2By%26%23179%3B%29%C3%B7%28x%2By%29)
(x+y)²-(x³+y³)÷(x+y)
(x+y)²-(x³+y³)÷(x+y)
(x+y)²-(x³+y³)÷(x+y)
(x+y)²-(x³+y³)÷(x+y)
x^3+y^3=(x+y)(x^2-xy+y^2)
则原式变为
(x+y)²-(x^2-xy+y^2)
=(x^2+2xy+y^2)-(x^2-xy+y^2)
=3xy
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来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 15:51:31
(x+y)²-(x³+y³)÷(x+y)
(x+y)²-(x³+y³)÷(x+y)
(x+y)²-(x³+y³)÷(x+y)
(x+y)²-(x³+y³)÷(x+y)
x^3+y^3=(x+y)(x^2-xy+y^2)
则原式变为
(x+y)²-(x^2-xy+y^2)
=(x^2+2xy+y^2)-(x^2-xy+y^2)
=3xy