1.
Find the value of
b
that makes
x
2
+
bx
+ 36 a perfect square.
A.
12
B.
-12, 12
C.
6
D.
324
Hint
2.
Solve
x
2
- 4
x
+ 1 = 0 by completing the square.
A.
1, 3
B.
C.
D.
Hint
3.
Solve 2
z
2
+
z
- 4 = 0 by completing the square.
A.
B.
C.
D.
-2, 1
Hint
4.
Solve
x
2
– 8
x
+ 16 = 13 by taking the square root of each side.
A.
4
B.
-4
C.
-2
D.
2
Hint
5.
When using a quadratic equation of the form
a
x
2
+
b
x
+
c
= 0 to find distances, what should always be ignored?
A.
any negative solution
B.
any solution if
a
is negative
C.
any solution if
is negative
D.
any positive solution
Hint