Question

Rationalise the denominator of 4

√2−√5​

Answer 1

Given -:

4/√2−√5​

4/√2−√5​ * √2 +√5​ / √2+√5​

√8−√25 / (√2−√5​) (√2+√5​)​ (using identity b square - a square)

√8−√25 / (√5)² - (√2) ²

√8−√25 / (√25−√4 )

√8−√25 / (5 - 2)

ANSWER : √8−√25 / 3

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