1.
Which of the following trinomials is a perfect square trinomial?
A.
r
2
- 6
r
+ 36
B.
4
y
2
+ 10
y
+ 25
C.
x
2
+ 16
x
+ 16
D.
9
a
2
- 12
a
+ 4
Hint
2.
Factor
x
2
-
y
4
A.
(
x
+
y
)(
x
–
y
)
B.
(
x
-
y
2
)(
x
-
y
2
)
C.
(
x
-
y
2
)(
x
+
y
2
)
D.
(
x
+
y
2
)(
x
+
y
)(
x
–
y
)
Hint
3.
Factor 10
x
2
+ 24
x
+ 8.
A.
(2
x
+ 4)(5
x
+ 2)
B.
2(
x
+ 4)(5
x
+ 1)
C.
(
x
+ 2)(5
x
+ 2)
D.
2(
x
+ 2)(5
x
+ 2)
Hint
4.
Factor 81
x
2
– 225.
A.
9(9
x
– 5)(9
x
+ 5)
B.
9(9
x
– 25)(9
x
+ 25)
C.
It is prime.
D.
9(3
x
– 5)(3
x
+ 5)
Hint
5.
Solve the following:
y
2
+ 6
y
+ 9 = 49.
A.
{7}
B.
{10, –4}
C.
{–10, 4}
D.
{7, –7}
Hint