|
If the quadratic has no linear, or first-degree term (i.e. b = 0),
then it can be solved by isolating the x2 and taking square
roots of both sides:
- You need both the
positive and negative roots because
 , so x could be either positive or negative.
- This is only going to
give a real solution if either a or c is negative (but not
both)
|
