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19 March, 14:51

What is the factored form of the expression?

s4 - 16

A. (s - 2) 2 (s + 2) 2

B. (s - 2) (s + 2)

C. (s - i) (s + i) (s - 2) (s + 2)

D. (s^2 + 4) (s + 2) (s - 2)

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Answers (1)
  1. 19 March, 15:14
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    S⁴ - 16

    s⁴ + 4s² - 4s² - 16

    s² (s²) + s² (4) - 4 (s²) - 4 (4)

    s² (s² + 4) - 4 (s² + 4)

    (s² - 4) (s² + 4)

    (s² + 2s - 2s - 4) (s² + 4)

    (s (s) + s (2) - 2 (s) - 2 (2)) (s² + 4)

    (s (s + 2) - 2 (s + 2)) (s² + 4)

    (s - 2) (s + 2) (s² + 4)

    The answer is D.
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