Mathematics for IGCSE & O level - Equations (Section 4 - No. 14)
Which is the appropriate situation to use the quadratic formula?
When you can easily factor a quadratic.
When it is not possible to factor a quadratic.
When the equation has only one variable.
When you want to simplify the quadratic.
Giải thích
The quadratic formula works regardless of whether the equation can be easily factored or not.