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Rationalising the denominator of 1/(sqrt5 - 2) gives which value?

Asqrt5 - 2
Bsqrt5 + 2
C(sqrt5 + 2)/9
D1 - sqrt5
Answer & Solution
Correct answer: B. sqrt5 + 2
Multiplying by the conjugate gives (sqrt5+2)/(5-4) = sqrt5 + 2.
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