if x+1/x=3 find x^2+1/x^2
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(x+1/x) ^2 =x^2 + 1/x^2 *X*1/X
=>(3) ^2 = x^2 + 1/x^2 +2
⇒ 9=x^2 + 1/x^2 +2
=> x^2 + 1/x^2 +2 = 9
=> x^2 + 1/x^2 =9-2 =7
∴ x^2 + 1/x^2 =7
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Answered by
4
(x+1/x) ^2 =x^2 + 1/x^2 *X*1/X
=>(3) ^2 = x^2 + 1/x^2 +2
⇒ 9=x^2 + 1/x^2 +2
=> x^2 + 1/x^2 +2 = 9
=> x^2 + 1/x^2 =9-2 =7
∴ x^2 + 1/x^2 =7
HOPE IT HELPS! FOLLOW ME
thnkyu!
Have a great day! :)
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