Question

if x= 7+ sqrt 40 find the value of sqrt x +1/sqrt x

Answer 1

x = 7 + √40 = 7 + 2 √10 = x = 5 + 2 + 2 √10 = ( √ 5+ √2) 2. √x = √5 + √2. 1 / √x = 1 / ( √5 + √2) = ( √5 - √2) / 3. √5 + √2 + ( √5 - √2) / 3. (3√5 + 3 √2 + √5 - √2)/ 3. (4√5 + 2 √2) / 3. Was this answer helpful? 11.

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