I'll write the first one out to show you how to do it (without all the fancy LaTeX.)

I don't know if you are doing complete the square or quadratic formula. Since you are supposed to show your work, I'll assume completing the square.

x^2 – 4x – 4 = 0 <-- (x^2 indicates x to the second power)

x^2 - 4x = 4

x^2 - 4x + 4 = 4 + 4

(x - 2)^2 = 8

x - 2 = +/- sqrt(8) <-- (sqrt(8) is the square root of 8 and +/- is the "plus-minus" symbol)

x = 2 +/- 2*sqrt(2) <-- (3*4 is three times four)

Why don't you show us what you did.

-Dan