# How do you solve #x^2 = 7x +8# using the quadratic formula?

##### 1 Answer

Apr 11, 2016

-1 and 8

#### Explanation:

Since (a - b + c = 0), use shortcut.

The 2 real roots are: - 1 and

**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#