(x+y)²*(x²-2xy+y²)=( )²
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(x+y)²*(x²-2xy+y²)=( )²
(x+y)²*(x²-2xy+y²)=( )²
(x+y)²*(x²-2xy+y²)=( )²
填:x³+y³
利用立方和公式得
(x+y)²*(x²-2xy+y²)²
=[(x+y)(x²-2xy+y²)]²
=(x³+y³)²