x-1/x=4 find x^2+(1/x)^2
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Given, x-1/x=4
Now,
x^2+1/x^2
=(x-1/x)^2+2x×1/x [by formula]
=(4)^2+2 [since x-1/x=4]
=16+2
=18(ans)
Now,
x^2+1/x^2
=(x-1/x)^2+2x×1/x [by formula]
=(4)^2+2 [since x-1/x=4]
=16+2
=18(ans)
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