Mathematics for IGCSE & O level - Surds (Section 3 - No. 5) | ExamPlay

Mathematics for IGCSE & O level - Surds (Section 3 - No. 5)

Rationalize the denominator: (√2 + 1)/ (√2 - 1).

3+2√2

3-2√2

1

2

Explanation

(√2 + 1) / (√2 - 1) * (√2 + 1) / (√2 + 1) = (2 + 2√2 + 1) / (2-1) = 3 + 2√2

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