x+1/x=8 then x2+1/x2 =?
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Answered by
29
x+1/x=8
⇒(x+1/x)²=8²
⇒x²+1/x²+2(x)(1/x)=64
⇒x²+1/x²=64-2
⇒x²+1/x²=62
⇒(x+1/x)²=8²
⇒x²+1/x²+2(x)(1/x)=64
⇒x²+1/x²=64-2
⇒x²+1/x²=62
Answered by
6
Hence, the value of x2+1/x2 is 50...
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correct answer is 62
x+1/x=8 , (x+1/x)2=8^2 , x2+1/x2+2x*(1/x) =64 , x2+1/x2 =64-2 , x2+1/x2 =62
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