Question

What us the value of x -1/x where x is 3+2√2

Answer 1

Answer:

x -1/x = 3+2√2 - 1/(3+2√2 )

        = 3+2√2 - (3-2√2) /( 9 - 8 )

        = 3+2√2 - 3+2√2

        = 4√2 ( answer )

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