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Math Help - emergency

  1. #1
    Junior Member
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    emergency

    qn: the eq connecting a and b in order that 2x^4-7x^3+ax+b may be divisible by (x-3) is
    a)3a+b-27
    b)3a-b+27
    c)3a+b+27
    d)none
    Last edited by CaptainBlack; July 3rd 2009 at 07:22 AM. Reason: deleted question asked elsewhere
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  2. #2
    Super Member malaygoel's Avatar
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    Quote Originally Posted by vungaralas View Post

    qn: the eq connecting a and b in order that 2x^4-7x^3+ax+b may be divisible by (x-3) is
    a)3a+b-27
    b)3a-b+27
    c)3a+b+27
    d)none
    at x=3 the given expression will become zero

    hence, 2.3^4-7.3^3+a.3+b=0
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