计算:[(x+y)³ - (x+y)²]÷(x+y)²=_____

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计算:[(x+y)³ - (x+y)²]÷(x+y)²=_____
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计算:[(x+y)³ - (x+y)²]÷(x+y)²=_____
计算:[(x+y)³ - (x+y)²]÷(x+y)²=_____

计算:[(x+y)³ - (x+y)²]÷(x+y)²=_____
[(x+y)³ - (x+y)²]÷(x+y)²
=(x+y)³ ÷(x+y)²- (x+y)²÷(x+y)²
=(x+y)-1
=x+y-1

x+y-1

[(x+y)³ - (x+y)²]÷(x+y)²=x+y-1