Can someone help me understand how to factor these questions? I mean work out one of them step by step so, I can try to figure one out. Thanks a bunch!

1. Factor completely.

2x2 + 40x + 200

a) 2(x + 10)(x + 20)

b) 2(x + 20)2

c) (2x + 10)2

d) 2(x + 10)2

e) none of the above

2. Factor 4x2 - 20x + 25. Select the answer.

a) 2x-5

b) (2x-5)2

c) (2x+5)2

d) 2x+5

e) none of these