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15 July, 19:37

Why is x-5 not a factor of - 3x^4 + 15x^3 - x + 5

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Answers (1)
  1. 15 July, 20:02
    0
    Step-by-step explanation:

    according to factor theroem,

    if x-a is a factor then then f (a) = 0

    lets try putting x value in equtaion it must come 0 x=5

    (-3*5) ^4 + (15*5) - 5+5

    =472500

    we dont get here answer 0 so it is not factor of it
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