
Bobosharif S. answered 07/03/18
Tutor
4.4
(32)
Mathematics/Statistics Tutor
a-1/a=4
Square both sides:
(a-1/a)2=42
a2-2+1/a2=16
a2+1/a2=18
Aman A.
asked 07/03/18Bobosharif S. answered 07/03/18
Mathematics/Statistics Tutor
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