Question

plz answer with full explanation

Answer 1

(y-1/y)^2=y^2+1/y^2-2
,(9)^2=y^2+1/y^2-2
,81+2=y^2+1/y^2
,y^2+1/y^2=83 it is the first answer ............
(y^2+1/y^2)=y^4+1/y^4+2
,(83)^2=y^4+1/y^4+2
,6889-2=y^4+1/y^4
,(y^4+1/y^4)=6887 it is ur second answer 
i belive that this answer is correct........

Answer 2

Answer:

refer to the attachment above for ur answer

Step-by-step explanation:

hope it helps you ^_^

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