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Mathematics
Problem
Which factor should be multiplied to both numerator and denominator to rationalize the denominator of
1
5
−
2
\dfrac{1}{\sqrt{5}-2}
5
−
2
1
? a)
5
\sqrt{5}
5
b)
(
5
−
2
)
2
(\sqrt{5}-2)^{2}
(
5
−
2
)
2
c)
5
+
2
\sqrt{5}+2
5
+
2
d)
5
−
2
\sqrt{5}-2
5
−
2
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