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If x^2+1/x^2=7 then find x-1/x |
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Answer» X^2+(1/x^2)=7 x-(1/x)=?? SQUARE x-(1/x) x^2-2+(1/x^2) substitute x^2+(1/x^2)=7 7-2=5 (x-[1/x])^2=5 take the square ROOT of both sides x-(1/x)=√5 |
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