1、a^3+b^3=(a+b)^3-3ab( ) 2、(x+y)( )=x^5-y^5 括号里填什么
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![1、a^3+b^3=(a+b)^3-3ab( ) 2、(x+y)( )=x^5-y^5 括号里填什么](/uploads/image/z/7810140-12-0.jpg?t=1%E3%80%81a%5E3%2Bb%5E3%3D%28a%2Bb%29%5E3-3ab%28+%29+2%E3%80%81%28x%2By%29%28+%29%3Dx%5E5-y%5E5+%E6%8B%AC%E5%8F%B7%E9%87%8C%E5%A1%AB%E4%BB%80%E4%B9%88)
1、a^3+b^3=(a+b)^3-3ab( ) 2、(x+y)( )=x^5-y^5 括号里填什么
1、a^3+b^3=(a+b)^3-3ab( ) 2、(x+y)( )=x^5-y^5 括号里填什么
1、a^3+b^3=(a+b)^3-3ab( ) 2、(x+y)( )=x^5-y^5 括号里填什么
1、a^3+b^3=(a+b)^3-3ab(a+b)
2、(x+y)( )=x^5-y^5(题目有问题)
(x+y)[x^4 -(x^3)y+(x^2)(y^2)-x(y^3)+y^4]=x^5 + y^5
(x-y)[x^4+(x^3)y+(x^2)(y^2)+x(y^3)+y^4]=x^5 - y^5
a^3+b^3=(a+b)^3-3ab(a+b )
(x+y) [5xy(x^2+xy+y^2) ]=x^5-y^5
1.a^3+b^3=(a+b)^3-3ab(a+b)
1. a+b