1.
Factor
x
2
– 16.
A.
(
x
– 4)(
x
– 4)
B.
(
x
+ 4)(
x
– 4)
C.
(
x
+ 2)(
x
– 8)
D.
(
x
+ 4)(
x
+ 4)
Hint
2.
Solve
x
2
–
x
– 72 = 0.
A.
x
= -8 or
x
= 9
B.
x
= -8
C.
x
= 9
D.
x
= 8 or
x
= -9
Hint
3.
Solve 2
z
2
+
z
- 4 = 0 by completing the square.
A.
-2, 1
B.
C.
D.
Hint
4.
Backtrack to find the input for the flowchart.
A.
b
= –3
B.
b
= 5
C.
b
= –5
D.
b
= 3
Hint
5.
Give the approximate solutions of this equation.(2
z
– 3)
2
– 31 = 33
A.
z
= 2.5 and
z
= 5.5
B.
z
= –2.5 and
z
= –5.5
C.
z
= –2.5 and
z
= 5.5
D.
z
= 2.5 and
z
= –5.5
Hint
6.
Find the solutions of the equation.–2(
x
– 7)
2
= –32
A.
x
= 3 and
x
= –11
B.
x
= 3 and
x
= 11
C.
x
= –3 and
x
= 11
D.
x
= –3 and
x
= –11
Hint
7.
In the quadratic formula, what does
b
2
– 4
ac
tell you.
A.
the vertex of a quadratic equation
B.
the solution(s) in a quadratic equation
C.
the number of solutions in a quadratic equation
D.
the places where a quadratic equation crosses the
x
-axis
Hint
8.
Find the quadratic equation with 1 solution.
A.
4
x
2
+ 4
x
– 35= 0
B.
x
2
– 2
x
+ 2= 0
C.
x
2
+ 6
x
+ 9 = 0
D.
x
2
– 10
x
+ 21= 0
Hint