a-1/a=3, find the value of a^2+1/a^2
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Answer:
a + 1/a = 3
=>(a + 1/a)^ = 3^2
=>a^2 + 2. a. 1/a + 1/a^2 = 9
=>a^2 + 2 + 1/a^2 = 9
=> a^2 + 1/a^2 = 9-2 = 7
hope it helps
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