# How do you solve 3x² + x – 2 = 0?

May 8, 2016

-1 and $\frac{2}{3}$

#### Explanation:

Since a - b + c = 0, use shortcut.
The 2 real roots are: -1 and (-c/a = 2/3).

REMINDER OF SHORTCUT
- When a + b + c = 0, there are 2 real roots: 1 and $\frac{c}{a}$
- When a - b + c = 0, there are 2 real roots: -1 and (-c/a).
Remember this shortcut. It will save you a lot of time and effort.