Solve the following equation algebraically:

-5x2 - 4x = - 9 

x = Give ONE solution at a time!   ?

Hints:

  1. You can solve quadratic equations with the p-q formula. Swedish National Test Formula Collection
    I hope you know that x^2 is the same as ? Otherwise check "Skriva Ma på dator"
    (there is also described how you can write characters like ^ = * / < > ( ) with a keyboard)
  2. -5x2 - 4x = - 9 is not in the right form:
    x² + px + q=0, What would make the term not have - 5 as coefficient?
  3. Divide both sides with - 5!
  4. x2 - 4x/(-5) = - 9/(-5) should have the signs sorted out and still doesn't have 0 in the right side (which fits the standard Swedish form).

    DO NOT READ ANY MORE HINTS BEFORE YOU HAVE REALLY TRIED TO USE THE HINTS ABOVE AND TESTED YOUR ANSWER. But it you still aren't getting anywhere, look at more hints. There are about 12 hints, all told.

Another hint?