Question

if x²+1/x² =18, find x-1/x

Answer 1

Given,
X²+1/x²=18
:.(x-1/x)²=x²+1/x²-2(x×1/x)
Since(a-b)²=a²+b²-2ab
(X-1/x)²=x²+1/x²-2
Putting value
(X-1/x)²=18-2
(X-/1/x)²=16
X-1/x=√16
X-1/x=4
(ÆÑẞWĒRẞ)

#Mãrk åß thē Brāìñlïêßt
Rëgàrdß
Tèám Kâñçhä

Answer 2

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