if x - 1/x=3 then x²+1/x² = ? plz explain
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Answer:
11
Step-by-step explanation:
x - 1/x = 3
=> (x - 1/x)² = (3)² [Squaring both sides]
=> x² + 1/x² - 2 = 9
=> x² + 1/x² = 9+2
=> x² + 1/x² = 11
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