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12 September, 21:45

Square root of x^2-4 plus x^2/x^2+1

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  1. 12 September, 21:52
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    √x² - 4 + x²/x² + 1

    x - 2 + x²/x² + 1

    x - 2 + x²

    1 x² + 1

    (x - 2) (x² + 1) + x²

    (1) (x² + 1) x² + 1

    x³ + x - 2x² - 2 + x²

    x² + 1 x² + 1

    x³ - 2x² + x² + x - 2

    x² + 1

    x³ - x² + x - 2

    x² + 1

    x³ + x - 2
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