1. check all polynomials that are perfect square trinomials:
9x2 − 6x + 1
36b2 − 24b + 8
16x2 + 24x + 9
4a2 − 10a + 25
2. factor completely: x2 − 8x + 16
(x + 4)(x + 4)
(x − 4)(x − 4)
(x + 4)(x − 4)
(x − 2)(x − 8)
3. factor completely: 16x2 + 40x + 25
(4x − 5)(4x − 5)
(2x − 5)(2x − 5)
(2x + 5)(2x + 5)
(4x + 5)(4x + 5)
4. rhett decides to build a square room for his movie and music collection. if the area of the room is 9x2 − 6x + 1 square feet, what is the length of one side of the room?
(3x + 1) feet
(9x − 1) feet
(3x − 1) feet
(9x + 1) feet
5. given the following perfect square trinomial, fill in the missing term. (do not type the variable in the blank.)

4x2 + + 49