C part with explanation
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Answer:
Step-by-step explanation:
Here
Squaring both sides
----------- ( i )
First Part:
We know that, (a - b)² = a² - 2ab + b², therefore
Putting value of [x² + 1/x²] from equation ( i )
Second Part:
Squaring both sides
Third Part:
From equation ( i ) we get
Squaring both sides
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