(1)x²-y²/xy×x/x-y (2)a/a²+6a+9÷a平方/a+3
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![(1)x²-y²/xy×x/x-y (2)a/a²+6a+9÷a平方/a+3](/uploads/image/z/10194806-38-6.jpg?t=%EF%BC%881%EF%BC%89x%26%23178%3B-y%26%23178%3B%2Fxy%C3%97x%2Fx-y+%EF%BC%882%EF%BC%89a%2Fa%26%23178%3B%2B6a%2B9%C3%B7a%E5%B9%B3%E6%96%B9%2Fa%2B3)
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(1)x²-y²/xy×x/x-y (2)a/a²+6a+9÷a平方/a+3
(1)x²-y²/xy×x/x-y (2)a/a²+6a+9÷a平方/a+3
(1)x²-y²/xy×x/x-y (2)a/a²+6a+9÷a平方/a+3
(x²-y²)/(xy)×(x/x-y)
=(x+y)(x-y)/(xy)×(x/x-y)
=(x+y)/y
(a/a²+6a+9)÷(a平方/a+3)
=a/(a+3)²×(a+3)/a²
=1/[a(a+3)]