-2x² + 4x - 2 = -2(x² - 2x + 1) = -2(x - 1)²
ну или
-2x² + 4x - 2 = 2(-x² + 2x - 1)
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Verified answer
-2x² + 4x - 2 = -2(x² - 2x + 1) = -2(x - 1)²
ну или
-2x² + 4x - 2 = 2(-x² + 2x - 1)