Question

If a² - 2a - 1 = 0, then a²+1/a²
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Answer 1

Step-by-step explanation:

given a²-2a-1=0 then a+1/a=?

= a²-2a=1

= a²-a=1+1/2

= a= 1/2 .

therefore, a+1/a= 1/2+1/1/2 =1/4

Answer 2

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HERE IS UR ANSWER

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a² - 2a - 1 = 0,

a²+1/a² = 1+2a+1/1+2a

=(1+2a)²+1/1+2a