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E45-3eso-2
Contributed by:
GONZALEZ-CABALLERO
__
1.
(5x + 1) (5x − 1)
A.
x
2
− 25
__
2.
(5x + 1)
2
B.
x
2
+ 10x + 25
__
3.
(5x + 5) (5x − 5)
C.
25x
2
- 10x + 1
__
4.
(5x + 5)
2
D.
x
2
- 10x + 25
__
5.
(5x + 5)
2
- (5x - 5)
2
E.
25x
2
+ 10x + 1
__
6.
(5x - 1)
2
F.
25x
2
- 1
__
7.
(5x - 5)
2
G.
25x
2
+ 50x + 25
__
8.
(x + 5) (x − 5)
H.
25x
2
- 50x + 25
__
9.
(x + 5)
2
I.
100x
__
10.
(x - 5)
2
J.
25x
2
- 25
__
11.
(2k
2
+ 1) (2k
2
- 1)
A.
4k
4
- 1
__
12.
(2k
2
+ 1)
2
B.
4k
4
+ 4k
2
+ 1
__
13.
(2k
2
+ 2) (2k
2
- 2)
C.
4k
4
- 4k
2
+ 1
__
14.
(2k
2
+ 2)
2
D.
k
4
+ 4k
2
+ 4
__
15.
(2k
2
- 1)
2
E.
k
4
- 4k
2
+ 4
__
16.
(2k
2
- 2)
2
F.
4k
4
+ 8k
2
+ 4
__
17.
(2k
2
- 2)
2
- (2k
2
+ 2)
2
G.
-16k
2
__
18.
(k
2
+ 2)
2
H.
4k
4
- 8k
2
+ 4
__
19.
(k
2
- 2)
2
I.
4k
4
- 4
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