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= 2 ((x-1) (x-1))
= 2 (x²-2x+1)
= 2x² - 4x + 2
2*(x-1)*(x-1) =
2*(x^2 - x - x + 1)=
2*(x^2 - 2x + 1) = 2x^2 - 4x + 2
jawabannya: 2x^2 - 4x + 2