Math

posted by .

If the quadratic equation x^2 + bx +c=0 has exactly one solution r, then find b/c.

  • Math -

    x^2 + bx + c = (x-r)^2
    2r = -b
    r^2 = c

    b/c = r^2/(-r/2) = -2r

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Quadratic -Make up a problem

    I am supposed to write a quadratic equation in the varible x having the given numbers as solutions. Type the equation in standard ax^2+bx+c=0 my solution is 1, only one solution. The equation is __________=0?
  2. Algebra

    How do you know if a quadratic equation will have one, two, or no solutions?
  3. algebra II

    How do you know if a quadratic equation will have one, two, or no solutions?
  4. ALGEBRA-MAT117

    How do you know if a quadratic equation will have one, two, or no solutions?
  5. ALGEBRA

    How do you know if a quadratic equation will have one, two, or no solutions?
  6. algebra II

    How do you know if a quadratic equation will have one, two, or no solutions?
  7. Mat/117 DQ1

    How do you know if a quadratic equation will have one, two, or no solutions?
  8. Math Help

    Consider the quadratic equation (a) Solve the equation using the quadratic formula, expressing your answer in terms of k. (b) What condition on k will assure that the equation has exactly one solution?
  9. Math

    Solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth. Separate the solutions with a comma …
  10. Math

    Solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth. Separate the solutions with a comma …

More Similar Questions