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JAMB Mathematics 2011 Paper
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© africaexams.com
Question : 7
Total: 46
Rationalize
2
−
√
5
3
−
√
5
1
−
√
5
2
1
−
√
5
4
√
5
−
1
2
1
+
√
5
4
Validate
Solution:
2
−
√
5
3
−
√
5
x
3
+
√
5
3
+
√
5
(
2
−
√
5
)
(
3
+
√
5
)
(
3
−
√
5
)
(
3
+
√
5
)
=
6
+
2
√
5
−
3
√
5
−
√
25
9
+
3
√
5
−
3
√
5
−
√
25
=
6
−
√
5
−
5
9
−
5
=
1
−
√
5
4
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