Question

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If a=2+√3, then a^2+1/a^2=? ​

Answer 1

Answer:

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Answer 2

Given:-- a= 2+✓3

Find:---- a^2 +1/a^2

Solution:---

a=2+✓3

1/a = 2-✓3

a^2+1/a^2

=(a+1/a)^2 -2a×1/a

=(2+✓3+2-✓3)^2-2

=4^2-2

= 16-2

= 14[Ans.]