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29 December, 10:37

Find the domain of a rational expression (x^2-16) (x-7) / (x+4) (x^2-49)

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  1. 29 December, 10:53
    0
    Domain is:

    x is an element of a real number, but isn't equal to - 4, 7 or - 7.
  2. 29 December, 10:53
    0
    (x² - 16) (x - 7) = (x³ - 7x² - 16x + 112) = 1 - 1 3/4 + 4 - 7 = - 3 3/4

    (x + 4) (x² - 4) (x³ + 4x² - 4x - 16)
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