(2x^- 2)/(3x^ +3) : (x^-2x+1)/(9x^-9)= ^ to znaczy do kwadratu / kreska ułamkowa
(2x^2-2)/(3x^2):(x^2-2x+1)/(9x^2-9)=(2x^2-2)/(3x^2)*(9x^2-9)/(x^2-2x+1)=2(x^2-1)/3(x^2+1)*9(x^2-1)/(x-1)^2=18(x-1)(x-1)(x-1)(x-1)/3(x^2+1)(x-1)(x-1)=6(x+1)^2/x^2+1
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(2x^2-2)/(3x^2):(x^2-2x+1)/(9x^2-9)=(2x^2-2)/(3x^2)*(9x^2-9)/(x^2-2x+1)=2(x^2-1)/3(x^2+1)*9(x^2-1)/(x-1)^2=18(x-1)(x-1)(x-1)(x-1)/3(x^2+1)(x-1)(x-1)=6(x+1)^2/x^2+1