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Math Help - Function problem

  1. #1
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    Function problem

    I have a given function:

     g(x) = \frac {ax^2+bx+c}{x+d}

    I have to find the:

    Roots of this function.... am I able to find them at this variable? or I must subtitute a,b,c,d with a number?
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  2. #2
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by Anemori View Post
    I have a given function:

     g(x) = \frac {ax^2+bx+c}{x+d}

    I have to find the:

    Roots of this function.... am I able to find them at this variable? or I must subtitute a,b,c,d with a number?
    Finding the roots means solving g(x) =0

    \frac{ax^2+bx+c}{x+d} = 0

    From the domain we know that x \neq -d. Given this condition multiply both sides by x+d.

    ax^2+bx+c=0 is standard form for a quadratic equation and hence easy to solve for x in terms of a,b and c
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  3. #3
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    Quote Originally Posted by e^(i*pi) View Post
    Finding the roots means solving g(x) =0

    \frac{ax^2+bx+c}{x+d} = 0

    From the domain we know that x \neq -d. Given this condition multiply both sides by x+d.

    ax^2+bx+c=0 is standard form for a quadratic equation and hence easy to solve for x in terms of a,b and c

    Thanks! But I can't figure how to solve just a letter. its easy for me if the variable are numbers and i will use quadratic formula for the numerator. right?
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