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Quadratic Equation

  1. Nov 24, 2016 #1
    1. The problem statement, all variables and given/known data

    How to solve for kd or equation with 2 unknowns given:
    b= 10
    n= 8
    As = 2.37

    2. Relevant equations

    for the quadratic equation b * (kd)^2 /2 - n * As (d - kd) = 0

    3. The attempt at a solution

    should one use algebra, calculus, what? how do you solve for kd? this is not homework.. just want to know how.. please show the steps.. thanks..
  2. jcsd
  3. Nov 24, 2016 #2


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    2017 Award

    Why not just google the terms ?
    Have you ever seen the textbook on how to solve ##\ ax^2+bx+c=0\ ## for ##\ x \ ## ?
    That recipe leaves you with an expression(*) of kd as a function of d, which is all you can expect from one equation with two unknowns.

    (*) actually, a bit more: you'll also get criteria for d that allow kd to be real number(s).
  4. Nov 24, 2016 #3

    Ray Vickson

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    We are not allowed to "show the steps"; that violates PF policy. We can only offer hints.
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