Question

Solve using the quadratic formula. (Identify a, b, and c. Write the

formula. Show the substitution step.

8n^2 + 4n -2 = 0

Answer 1

Explanation:

Here a = 8, b = 4 and c = -2. The discriminant here is b^2 - 4ac, which, when the above coefficients are substituted, results in:

discriminant = (4)^2 - 4(8)(-2), or 16 + 64, or 80.

The solutions are:

-(4) ± √80 -4 ± 4√5 4(-1 ±√5) -1 ± √5

n = ------------------ = ----------------- = --------------- = --------------

2(8) 16 4^2 4