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Thread: polyniomial problem

  1. #1
    Junior Member
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    polyniomial problem

    for what value of h is the polynomial f(x) = 2x^3 - hx^2 + 5x + 9 exactly divisible by x + 2 ?
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  2. #2
    Junior Member slovakiamaths's Avatar
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    $\displaystyle put x+2=0$
    x=-2
    now
    $\displaystyle 2x^3-hx^2+5x+9=0$
    $\displaystyle 2(-2)^3-h(-2)^2+5(-2)+9=0$
    $\displaystyle h=\frac{-17}{4}$
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