# How do you solve #x^2+8x+7=0#?

##### 2 Answers

Aug 15, 2015

The solutions are

#### Explanation:

The equation is of the form

The **Discriminant** is given by:

The solutions are found using the formula

Aug 16, 2015

Solve y = x^2 + 8x + 7 = 0

Ans: -1 and -7

#### Explanation:

Since (a - b + c = 0), use the shortcut. The 2 real roots are (- 1) and (-c/a = - 7).

**Reminder of Shortcut** :

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

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

Remember this Shortcut. It will save you a lot of time and effort.