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A) Rationalise the denominator of a,b,c

A) Rationalise the denominator of a,b,c-example-1

2 Answers

10 votes

Answer:

The above answer is correct

User Payling
by
7.7k points
4 votes

Answer:

See below

Explanation:

a)


(20)/( √(10) ) = (20 √(10) )/( √(10) * √(10) ) = (20 √(10) )/(10) = 2 √(10)

b)


( √(2) )/(2 √(5) - 1 ) \\ \\ = ( √(2) * (2 √(5) + 1 ))/((2 √(5) - 1)(2 √(5) + 1) ) \\ \\ = ( √(2) * 2 √(5) + √(2) * 1 )/((2 √(5) ) ^(2) - (1)^(2)) \\ \\ = ( 2 √(10) + √(2))/(20 - 1) \\ \\ = ( 2 √(10) + √(2))/(19) \\ \\ equating \: it \: with \: \\ ( a + √(b))/(c) \\ \\ a = 2 √(10) \\ \\ b = 2 \\ \\ c = 19

User Lamandy
by
7.7k points

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