Mathematics for IGCSE & O level - Surds (Section 1 - No. 15)

Which of the following is a correct way to rationalize the denominator for 1/(√5 - √2)?

Multiply by (√5 + √2)/(√5 + √2)

Multiply by (√5 - √2)/(√5 - √2)

Multiply by √5/ √5

Multiply by √2/ √2

To rationalize, multiply the fraction by the conjugate of the denominator over itself.