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b. (x/x-1)^2 - 3x/x-1 + 1 = x^2/(x^2-2x+1) - 3x/(x-1) + 1 = x^2 - 3x(x-1) + x^2 - 2x + 1/(x^2-2x+1) = x^2 - 3x^2 - 3x + x^2 - 2x + 1/(x^2-2x+1) = -x^2 - 5x + 1/(x^2-2x+1)
Ket:
^ = Pangkat
Maaf kalau berantakan .-.