Question

rationalise the denominator of 4+√5/4-√5​

Answer 1

Answer:

$4 + \sqrt{5} \div 4 - \sqrt{5} \times4 + \sqrt{5} \div 4 + \sqrt{5} \\ = (4 + \sqrt{5} ) ^{2} \div 16 - 5 \\ = 16 + 5 + 8 \sqrt{5} \div 9 \\ = 21 + 8 \sqrt{5} \div 9$

Answer 2

Answer:

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Step-by-step explanation:

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