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Algebra problem solving for q

  1. Jul 20, 2009 #1
    how do i go about solving for q in the equation:

    (F x r x r)/k = (6.63E-6 -q)(q)
  2. jcsd
  3. Jul 20, 2009 #2
    What are your knowns/unknowns and are there any additional equations?

    I skimmed over your other thread, and you're trying to solve for q where the rest of the variables are known, right?

    [tex]\frac{Fr^2}{k}=(6.63*10^{-6} -q)q[/tex]
    This is just a simple quadratic equation. Using factoring here obviously won't be useful since the numbers are a bit messy. Just arrange it to the general form ([tex]aq^2+bq+c=0[/tex]) and solve for q, and remember any limits you may have on its value because of its physical properties.
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