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Square root and cube root

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  1. (√5 - √3)/ (√5 + √3) is equal to ?
    1. 4 + √15
    2. 4 - √15
    3. 1/2
    4. 1
Correct Option: B

(√5 - √3)/ (√5 + √3)
= (√5 - √3) / (√5 + √3)
= (√5 - √3)2 / (5 - 3)
= (5 + 3 - 2√5 x 3) / 2
= 2 (4 - √15) / 2
= (4 - √15)


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