Question

please kindly answer

Answer 1

ʜᴇʏ ᴍᴀᴛᴇ!!

ʜᴇʀᴇ's ᴜʀ ᴀɴsᴡᴇʀ ᴅᴇᴀʀ:-)
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x-1/x=3

(x-1/x)^3= x^3-1/x^3-3× x ×1/x(x-1/x)

ᴘᴜᴛᴛɪɴɢ ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏғ x-1/x=3

(3)^3=x^3-1/x^3-3(3)

27=x^3-1/x^3-9

x^3-1/x^3=27+9

x^3-1/x^3=36 ᴀɴs...
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ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs☺️☺️

Answer 2

First cube both sides. Then use the identity (x+1/x)^3=x^3+1/x3 +3×x2×1/x+3x×1/x2= x3+1/x3+3x+3/x
This is equal to 3^3=27
X3+1/x3=27+3x+3/x=27+3(x+1/x)
Solve rhs you will get the answer
Try