Same chapter3 marksDifficulty: Medium
Prove that √2 is irrational.
Rational and Irrational Numbers
1 markDifficulty: Medium
The rationalising factor of √5 − √2 is:
- a√5 + √2
- b√5 − √2
- c√10
- d5 − 2
Original Khojo Papers practice question — not from a past board paper.
Answer
√5 + √2
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Multiplying by the conjugate gives a difference of squares, which removes the surds.
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