Question

If a^2+1/a^2=7,find (a+1/a)​

Answer 1

Answer:

a+1/a=√{a²+1/a²+2}=√(7+2) =√9=3

Answer 2

Answer:

$a^{2}$ + 1/$a^{2}$  =  7

$a^{2}$ + 1/$a^{2}$ = 9-2

$a^{2}$ + 1/$a^{2}$ +2 = 9

$(a+1/a)^{2}$= 9

$(a+1/a)^{2}$ =$3^{2}$

(a+1/a) = ± 3

hence a+1/a = ±3

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Step-by-step explanation: