Question

f x=15+224 find x^3/2+1/x^3/2​

Answer 1

Explanation:

see the above attachment

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Answer 2

Answer:

4-root15 + 1/4-root15 Then add 4 and 1 to make it 5-root 15/4-root15. conjugate of 4-root15 is 4+root15.

then eqn. is like (5-root15)(4+root15) / (4-root15)(4+root15)

= 20 + 5root15-4root15-15/16-15 because of identity (a+b)(a-b)=a^2 - b^2

=5+5root15-4root15 = 5+root15 is the answer because the radical or root15 base is same so gets subtracted.

:)