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-3x^3 + 2x^2 + 2 * x - 3 = 0
-3x^3 + 2x^2 + 2x - 3 = 0
-3(x^3 + 1) + 2x(x + 1) = 0
-3(x + 1)(x^2 - x + 1) + 2x(x + 1) = 0
(x + 1) [ -3(x^2 - x + 1) + 2x] = 0
x + 1 = 0 lub -3(x^2 - x + 1) + 2x
x = -1 ------ TAK liczba (-1) jest pierwiastkiem równania dla m = 2