86n
Higher tier only
Rationalising the denominator when the denominator is a single surd
Surd
Irrational number
Denominator
Rationalise
87n: expanding pairs of brackets containing surds (higher tier only)
88n: recognising a geometric sequence where the common ratio is a surd (higher tier only)
93n: rationalising the denominator by multiplying by a conjugate expression (higher tier only)
Rationalise denominator
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How to use this page
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