Question 43822
Factor each polynomial completely
2aČ - 4a -2

Common factor of "2".
So, 2(a^2-2a-1)
Use the quadratic formula to factor a^2-2a-1:

a=[2+sqrt(4+4)]/2=[1+sqrt2]
OR
a=[1-sqrt2]

So the factors are:
2
(a-1-sqrt2]
[a-1+sqrt2]

Cheers,
stan H.