need algebra help quick 3

Question 1.1. Factor.

x² â€“ 6x + 9

(x â€“ 3)²
  (x + 3)²
  (x â€“ 9)²
  (x + 9)²

Question 2.2. Which trinomial is a perfect square trinomial?

y²+ 6y + 36
  y² + 18y + 81
  y² + 50y + 100
  y² + 25y + 200

Question 3.3. Factor.

m² â€“ 16m + 64

(m + 64)²
  (m + 8)²
  (m â€“ 8)²
  Cannot be factored

Question 4.4. Factor.

x² + 8x + 16

(x â€“ 8)²
  (x + 8)²
  (x â€“ 4)²
  (x + 4)²

Question 5.5. Factor completely.

4u² â€“ 20u + 25

(Points : 1)

(2u â€“ 5)²
  (4u + 5)²
  2(2u â€“ 5)²
  (2u + 2)²