(x-y)³分之x-y 化简分式x²-6x+9分之x²-9

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(x-y)³分之x-y化简分式x²-6x+9分之x²-9(x-y)³分之x-y化简分式x²-6x+9分之x²-9(x-y)³分之x

(x-y)³分之x-y 化简分式x²-6x+9分之x²-9
(x-y)³分之x-y 化简分式
x²-6x+9分之x²-9

(x-y)³分之x-y 化简分式x²-6x+9分之x²-9
(x-y)/(x-y)^3=1/(x - y)^2
(x^2-9)/(x^2-6x+9)=(3 + x)/(-3 + x)

(1)(x-y)/(x-y)^3=1/(x-y)^2
(2)原式=(x-3)(x+3)/(x^2-2x+9)已经最简