Phân tích các đa thức sau thành nhân tử: a, x^2+4x+4
b,4x^2-4x+1
c,2x-1-x^2
d, x^2+x+1/4
e,(x+5)^2-4x^2
f,(x+1)^2-(2x-1)^2

Fgfbekbkdbe i appreciate it very much

1. statement- ca is parallel to db and e is the midpoint of ad reason- given2. statement- reason- alternate interior angles3. statement- de is congruent to ae reason- definition of midpoint4. statement- triangle aec is congruent to triangle deb reason- asa (angle side angle)