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Math Help - Cubic Equation

  1. #1
    Member ~berserk's Avatar
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    Cubic Equation

    Let P(x)= 4x^3-5x^2+7x-9 use synthetic substitution to find P(2)

    First i use synthetic substitution to get -7 for P(2) But according to the table for the equation 2 is supposed to equal 17 could you explain what I did wrong?
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  2. #2
    MHF Contributor
    skeeter's Avatar
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    Code:
    2]....4....-5....7....-9
    ............8....6....26
    ---------------------
    .......4....3...13....17
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