Question

Rationalise the denominator *

Answer 1

Answer:

3-√5/3+2√5

by rationalising

3-√5/3+2√5*3-2√5/3-2√5

3-√5(3-2√5)/3+2√5(3-2√5)

3(3-2√5)-√5(3-2√5)/3+2√5(3-2√5)

9-6√5-3√5+10/3+2√5(3-2√5)

19-9√5/3+2√5(3-2√5)

By using identity a²-b²=(a-b)(a+b)

19-9√5/(3)²-(2√5)²

19-9√5/9-10

19-9√5/1

Step-by-step explanation:

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Answer 2

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