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Answered by
0
Answer:
The answer will be 2.
Step-by-step explanation:
As (x+1/x)²-2=4-2= 2.
I hope this helps you.
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Answered by
0
Answer:
14
Step-by-step explanation:
x=2+√3, x²+1/x² =?
===============
- x²+1/x²=
- (2+√3)²+1/(2+√3)²=
- 4+4√3+3+1/(4+4√3+3)=
- 7+4√3+1/(7+4√3)=
- 7+4√3 + (7-4√3)/(7-4√3)(7+4√3)= multiplied by (7-4√3) to simplify
- 7+4√3+(7-4√3)/(49-16*3)=
- 7+4√3+(7-4√3)/(49-48)=
- 7+4√3+7-4√3=14
===============
Answer is 14
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