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(x^2 - 4x +4) - 6x +3x^2 = 4x^2 - 12x + 10
x^2 - 4x - 6x + 3x^2 - 4x^2 + 12x = 10 - 4
-10x + 12x = 6
2x = 6 /:2
x = 3
nie ma za co! :D
x^2 - 4x +4 - 6x + 3x^2 = 4x^2 - 12x + 10
Na jedną strone z x
2x = 6
x = 3