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Maths Puzzle
If {x+1/x}=9, find the value of {x^2+1?x^2}.
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- x+1/x=9
squaring both sides
x^2+1/x^2+2=81
or x^2+1/x^2=79 - 10 years agoHelpfull: Yes(3) No(0)
- ans wil be 7
- 10 years agoHelpfull: Yes(0) No(2)
- given that {x+1/x}=9 => x=1/8, then take square on both sides => x^2+1+2x/x^2=81
x^2+1/x^2=65. - 10 years agoHelpfull: Yes(0) No(2)
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