Question

if x-1/x=9then xsquare+1/xsquare​

Answer 1

Answer:

x-1/x=9

x-1=9x

-1=9x-x

8x=-1

x=-1/8

put x=-1/8 in x²+1/x²

(-1/8)²+1/(-1/8)²

1/64+1/1÷1/64

65/64×64

65

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