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8 March, 02:53

If 3x^2-2x+7=0, then (x-1/3) ^2 = ?

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  1. 8 March, 03:22
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    3x^2-2x+7=0

    3x^2-2x=-7

    3 (x^2-2/3x) = - 7

    3 (x^2-2/3x+1/9) = - 7+3 * (1/9)

    3 (x^2-2/3x+1/9) = - 20/3

    3 (x-1/3) ^2 = - 20/3

    (x-1/3) ^2 = (-20/3) / 3

    (x-1/3) ^2 = - 20/9
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