(3/9-х2+1/х-3) х/х2-6 х+9

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(3/9-x²+1/x-3):x/x²-6x+9
(3/(3-x)*(3+x)+1/x-3)*x²-6x+9/x
(3/-(x-3)*(3+x)+1/x-3)*(x-3)²/x
(-3/(x-3)*(3+x)+1/x-3)*(x-3)²/x
-3+3+x/(3+x)*(x-3)*(x-3)²/x=x/3+x*x-3/x=1/3+x*(x-3)
x-3/3+x