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17 September, 15:09

Rewrite x^2+9 as a product using complex numbers and the polynomial identity below

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  1. 17 September, 16:44
    0
    (x + 3i) (x - 3i)

    Step-by-step explanation:

    Express x² + 9 as a difference of squares which factors in general as

    a² - b² = (a + b) (a - b), thus

    x² + 9

    = x² - (3i) ²

    = (x + 3i) (x - 3i)
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