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7 September, 21:10

Determine how many, what type, and find the roots for f (x) = x3 - 5x2 - 25x + 125.

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  1. 7 September, 21:22
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    Hello:

    by grouping method:

    f (x) = x3 - 5x2 - 25x + 125. = x² (x - 5) - 25 (x - 5)

    f (x) = (x - 5) (x² - 25) = (x - 5) (x - 5) (x + 5)

    f (x) = (x-5) ² (x+5)
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