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AFCAT II 2012 Solved Paper
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© examsnet.com
Question : 45
Total: 100
If
a
(
a
+
b
)
=
17
23
, what is
(
a
+
b
)
(
a
–
b
)
equal to?
13
7
23
11
14
5
25
9
Validate
Solution:
a
a
+
b
=
17
23
23a = 17a + 17b
6a = 17b
a
=
17
6
b
a
+
b
a
−
b
=
17
6
b
+
b
17
6
b
−
b
=
17
6
+
1
17
6
−
1
⇒
a
+
b
a
−
b
=
23
11
© examsnet.com
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