If x-1/x=7 then find the value of x2+1/x2
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Answered by
2
x-1/x=7
so,x= -1/6
now, (x×x)+1/(x×x)=(-1/6)^2+1/(-1/6)^2=37
So...37 is the Answer
so,x= -1/6
now, (x×x)+1/(x×x)=(-1/6)^2+1/(-1/6)^2=37
So...37 is the Answer
Answered by
8
x - 1 / x = 7
==> ( x - 1 / x ) ² = 7 ²
==> x² + 1 / x² - 2 * x * 1/x = 49
==> x² + 1 / x² - 2 =49
==> x² + 1/x² =49 + 2
==> 51
The answer is 51
Hope it helps
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