Question

If a=5+2 root 6 fins the value of a^2+1/a^2

Answer 1

This is the perfect answer of the perfect question

a = 5+2√6

a²+1 = a⁴+1 = R

a² a²

a² = 25+24+2×5×2√6

a² = 49+20√6

a⁴ = 2401+2400+2×49×20√6

= 4801+1960√6

R = 4801+1+1960√6 = 4802+1960√6

49+20√6 49+20√6

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