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If: 3x^2 = 6x+4

Then: 3^2 -6x-4 = 0

Divide all terms by 3: x^2 -2x-4/3 = 0

Completing the square: (x-1)^2 -7/3 = 0 => (x-1)^2 = 7/3 or as 21/9

If: (x-1)^2 = 21/9

Then: x = 1 +/- (square root 21) over 3 which are the exact solutions

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