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30 December, 23:50

A whole number increased by its square is two more than twice itself. find the number

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  1. 31 December, 00:16
    0
    Let x be the number.

    => x + x² = 2x + 2

    => x² - x - 2 = 0

    => (x + 1) (x - 2) = 0

    ---> x = - 1, or 2

    You didn't mention negatives, but guessing you'd want "2".
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