# What is the discriminant of #7x^2+8x+1=0# and what does that mean?

##### 1 Answer

Jul 25, 2015

#### Answer:

Solve

Answer: -1 and

#### Explanation:

In this case (a - b + c = 0) we'd better use the shortcut --> two real roots: -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