1.
Solve
x
2
- 4
x
+ 1 = 0 by completing the square.
A.
B.
1, 3
C.
D.
Hint
2.
Solve
a
2
-
a
- 20 = 0 by completing the square.
A.
-4, 5
B.
-5, 4
C.
D.
Hint
3.
Solve 2
z
2
+
z
- 4 = 0 by completing the square.
A.
B.
C.
-2, 1
D.
Hint
4.
Identify the perfect square trinomial.
A.
4
x
2
+ 6
x
+ 2
B.
x
2
– 7
x
+ 12
C.
x
2
– 16
D.
25
x
2
+ 10
x
+ 1
Hint
5.
Rewrite the expression as a square with a constant added or subtracted.
x
2
– 6
x
– 15
A.
(
x
– 3)
2
+ 9
B.
(
x
– 3)
2
– 15
C.
(
x
– 3)
2
– 24
D.
(
x
– 3)
2
– 9
Hint