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x²-2x+ 1/3 = 0
x²-2x = -1/3
x²-2x+1² = -1/3 + 1²
(x-1)² = 2/3
x-1 = √ 2/3 atau x-1 = -√ 2/3
x= 1+√ 2/3 atau x= 1 - √ 2/3
= 1+ 1/3 √6 atau x = 1 - 1/3 √ 6
jawaban yg sesuai :C