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22 October, 20:30

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The square of a number is 12 less than 7 times the number. What is the number?

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  1. 22 October, 22:42
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    7x^2 - 12 = 0

    7x^2 = 12 | : 7

    x^2 = 12/7 | sqrt

    x = sqrt (12/7)

    x = sqrt (84) / 7

    x = 2sqrt (21) / 7
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