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26 June, 14:15

Is (x + 1) a factor of

f (x) = x3 + 2x2 - 5x - 6?

Yes

No

+2
Answers (2)
  1. 26 June, 15:20
    0
    Yes

    Step-by-step explanation:

    If x + 1 is a factor

    x = - 1 should be a root

    Check for the remainder:

    (-1) ³ + 2 (-1) ² - 5 (-1) - 6

    0

    Therefore it's a root, hence x+1 is a factor
  2. 26 June, 17:03
    0
    Yes.

    Step-by-step explanation:

    You can find it out by factoring but ill do it easier way.

    (x + 1) = 0 put the first and second equation to 0

    x = - 1

    x³ + 2x² - 5x - 6 = 0 Now plug in the x in the equation

    (-1) ³ + 2 (-1) ² - 5 (-1) - 6 = 0

    0 = 0

    so (x + 1) is a factor.
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