1.
Factor
x
2
– 16.
A.
(
x
+ 2)(
x
– 8)
B.
(
x
+ 4)(
x
– 4)
C.
(
x
– 4)(
x
– 4)
D.
(
x
+ 4)(
x
+ 4)
Hint
2.
Use the quadratic formula to solve 2
x
2
+ 7
x
+ 4 = 0. Approximate the solutions to the nearest hundredth.
A.
-5.56, -1.44
B.
-2.78, -0.72
C.
1.28, 3.66
D.
-3.35, -0.15
Hint
3.
Find the value of
c
that makes
x
2
+ 16
x
+
c
a perfect square.
A.
-64
B.
8
C.
16
D.
64
Hint
4.
Find the value of
b
that makes
x
2
+
bx
+ 36 a perfect square.
A.
12
B.
324
C.
6
D.
-12, 12
Hint
5.
Solve the equation by backtracking.
A.
p
= –12
B.
p
= –10
C.
p
= 12
D.
p
= 12 and
p
= –12
Hint
6.
Give the approximate solution of this equation.5 + (2
c
– 3)
2
= 5
A.
c
= 1.5
B.
c
= 1.5 and
c
= –1.5
C.
c
= –1.5 and
c
= –1.5
D.
c
= –1.5
Hint
7.
Find the solutions of the equation.(
s
– 5)(
s
+ 1) = 0
A.
s
= –5 and
s
= –1
B.
s
= 5 and
s
= –1
C.
s
= –5 and
s
= 1
D.
s
= 5 and
s
= 1
Hint
8.
Solve the equation.6
x
2
– 12
x
+ 3 = 0
A.
x
= 0.29 and
x
= –1.71
B.
x
= 0.29 and
x
= 1.71
C.
x
= –0.29 and
x
= –1.71
D.
x
= –0.29 and
x
= 1.71
Hint