# How do you solve #2x^2 + x - 1 = 0 # using the quadratic formula?

##### 1 Answer

Oct 15, 2015

#### Answer:

#### Explanation:

Standard Quadratic Equation :

Where,

a is the constant with x to the power 2.

b is the constant with x to the power 1.

c is the constant.

Standard Quadratic Formula:

Given Equation:

In this Case:

a = 2

b = 1

c = -1

put these values in the quadratic formula.