1.
Find the value of
b
that makes
x
2
+
bx
+ 36 a perfect square.
A.
12
B.
324
C.
6
D.
-12, 12
Hint
2.
Solve
x
2
- 4
x
+ 1 = 0 by completing the square.
A.
1, 3
B.
C.
D.
Hint
3.
Solve
a
2
-
a
- 20 = 0 by completing the square.
A.
-4, 5
B.
C.
D.
-5, 4
Hint
4.
Solve 2
z
2
+
z
- 4 = 0 by completing the square.
A.
B.
-2, 1
C.
D.
Hint
5.
Rewrite the expression as a square with a constant added or subtracted.
x
2
– 6
x
– 15
A.
(
x
– 3)
2
– 15
B.
(
x
– 3)
2
– 9
C.
(
x
– 3)
2
+ 9
D.
(
x
– 3)
2
– 24
Hint