1.
Find the value of
b
that makes
x
2
+
bx
+ 36 a perfect square.
A.
6
B.
-12, 12
C.
12
D.
324
Hint
2.
Solve
a
2
-
a
- 20 = 0 by completing the square.
A.
-4, 5
B.
C.
-5, 4
D.
Hint
3.
Solve
x
2
– 12
x
+ 34 = 0 by taking the square root of each side.
A.
{6}
B.
C.
{5, 7}
D.
Hint
4.
Solve 0.25
x
2
– 7
x
– 15 = 0.
A.
{3, 15}
B.
{–5, 3}
C.
{–2, 30}
D.
{4, 30}
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 positive solution
B.
any solution if
a
is negative
C.
any negative solution
D.
any solution if
is negative
Hint