# How do you solve #x^2 – x – 2 = 0#?

##### 2 Answers

Aug 1, 2015

Solve y = x^2 - x - 2 = 0

Answer: -1 and 2.

#### Explanation:

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

-1 and (-c/a = 2/1 = 2)

REMINDER of Shortcut.

When (a + b + c = 0) --> 2 real roots -> 1 and (c/a)

When (a - b + c = 0) --> 2 real roots --> (- 1) and (- c/a).

Try to remember this Shortcut. It will save you a lot of time and effort!!!.

Aug 2, 2015

#### Explanation:

Quadratic Formula

Solve for