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14 January, 17:26

1. Solve x2-4x+18=0.

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  1. 14 January, 19:43
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    X²-4x+18=0

    x = 4 ± √ (16-4*1*18) / 2

    x=4±√ (16-72) / 2

    x = 4 ± √-56 / 2

    x = 4±2i√14 / 2

    x = 2±√14 * i
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