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

8n^2 + 4n -2 = 0

Step-by-step 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

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.

step-by-step explanation:

abc