You can put this solution on YOUR website! Square root property to solve the equation:
(1-3x)^2=23
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1-3x = sqrt(23) or 1-3x = -sqrt(23)
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3x = 1-sqrt(23) or 3x = 1+sqrt(23)
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x = (1-sqrt(23))/3 or x = (1+sqrt(23))/3
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Cheers,
Stan H.