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sqrt(147) - sqrt(75)=...

`sqrt(147) - sqrt(75)`=

A

`sqrt3`

B

`2 sqrt3`

C

`3 sqrt3`

D

`4 sqrt3`

Text Solution

Verified by Experts

The correct Answer is:
B
`sqrt(147) - sqrt(75)`
`= sqrt(49 xx 3) - sqrt(25 xx 3)`
`= 7 sqrt3 - 5 sqrt3 = 2 sqrt3`
Hence (b) is correct
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CALCUTTA BOOK HOUSE-QUADRATIC SURDS-Exercise -3.2
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  7. Rationalising factor of (root(3)(3) + root(3)(2)) is

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  12. root(5)((32)/(243)) is a surd

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  13. show that (7)/(2^((1)/(2)) + 2^((1)/(4)) + 1) = 1 - 3.2^((1)/(4)) + 2....

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  14. Write which one is a rational number and which one is a surd : root(6)...

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  16. Express as complete surds: 3 sqrt2, 2 root(3)(4)

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  17. (a) If x gt a, y gt b and x + y = a + b, then find which one of (sqrtx...

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