What is the next step to solving the following equation by using the quadratic formula?

2n2 - 7n - 3 = 0

n=7± (-7) 2-4 (2) (-3) 2 (2)

2n² - 7n - 3 = 0

Δ = b² - 4. a. c

Δ = - 7² - 4. 2. - 3

Δ = 49 - 4. 2. - 3

Δ = 73

There are 2 real roots.

n = (-b + - √Δ) / 2a

n' = (--7 + √73) / 2.2

n'' = (--7 - √73) / 2.2

n' = (7 + √73) / 4

n'' = (7 - √73) / 4