1.
Solve 2
z
2
+
z
- 4 = 0 by completing the square.
A.
-2, 1
B.
C.
D.
Hint
2.
Find the solutions of the equation.3(
x
+ 1)
2
– 4 = 23
A.
x
= 4 and
x
= –2
B.
x
= 2 and
x
= –4
C.
x
= 2 and
x
= –2
D.
x
= 4 and
x
= –4
Hint
3.
Find the solutions of the equation.(
x
– 2)
2
– 1 = 3
A.
x
= –4 and
x
= –4
B.
x
= 0 and
x
= 4
C.
x
= 4 and
x
= –4
D.
x
= 0 and
x
= –4
Hint
4.
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
5.
Rewrite the expression as a square with a constant added or subtracted.
x
2
– 6
x
– 15
A.
(
x
– 3)
2
– 24
B.
(
x
– 3)
2
– 15
C.
(
x
– 3)
2
+ 9
D.
(
x
– 3)
2
– 9
Hint