4. The method of completing the square was used to solve the equation 2x? - 12x + 6 = 0. Which equation is a correct step when using this method? 1) (х- 3)2 - 6 %3! 2) (x - 3)2 = -6 3) (х- 32 - 3 4) (x - 3)² = -3

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