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21 November, 18:58

Divide and simplify:

(x^2 - 2 x - 8) / (x^2 + 10 x + 16) - : (x^2 - 16) / (x^2 - 64)

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  1. 21 November, 19:19
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    x² - 2x - 8 - x² - 16 = (x² - 2x - 8) (x² - 64) - (x² - 16) (x² + 10x + 16) =

    x² + 10x + 16 x² - 64 (x² + 10x + 16) (x² - 64) (x² + 10x + 16) (x² - 64)

    x^4 - 64x² - 2x³ + 128x - 8x² + 512 - x^4 + 10x³ + 16x² - 16x² - 160x - 256 =

    x^4 - 64x² + 10x³ - 640x + 16x² - 1024 x^4 - 64x² + 10x³ - 640x + 16x² - 1024

    x^4 - 2x³ - 56x² + 128x + 512 - x^4 + 10x³ + 160x - 256 =

    x^4 + 10x³ - 48x² - 640x - 1024 x^4 + 10x³ - 48x² - 640x - 1024

    8x³ - 56x² - 32x + 256 = 4x³ - 7x² - x + 1

    x^4 + 10x³ - 48x² - 640x - 1024 x^4 + 5x³ - 20x - 4
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