Math, asked by sakshisharmamtms, 2 months ago

if a=5+2 √6,then find the value of a^2+1/a^2
please solve this don't spam please​

Answers

Answered by TheBrainlistUser
3

\large\underline\mathfrak\red{Given  \: :- }

  • a = 5 + 2√6

\large\underline\mathfrak\red{To  \: find  \: :- }

  • a² + 1/a²

\large\underline\mathfrak\red{Solution \:  :- }

First we find the value of a² ( ∵ Easy to solve )

\sf\implies{(5 + 2 \sqrt{6}) {}^{2}  } \\

Here,

We use formula

\sf\implies{(a + b) {}^{2} = a {}^{2} + 2ab + b {}^{2}   }

\sf\implies{5 {}^{2} +  2 \times5 \times 2 \sqrt{6}   + (2 \sqrt{6}) {}^{2}  } \\ \sf\implies{25 + 10 \times 2 \sqrt{6} + 4 \times 6 } \:  \:  \:  \:  \:  \:  \:  \:  \\ \sf\implies{25 + 20 \sqrt{60} + 24 } \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\ \sf\implies{49 + 20 \sqrt{60} } \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\

Putting value

\sf\implies{a {}^{2}  +  \frac{1}{a {}^{2} } } \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \ \\ \sf\implies{49 + 20 \sqrt{60} +  \frac{1}{49 + 20 \sqrt{60} }  } \:  \:  \:  \:  \:  \:  \:  \:  \\ \sf\implies{taking \: LCM} \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \\ \sf\implies{ \frac{49 + 20 \sqrt{60} \times 49 + 20 \sqrt{60}  + 1 }{49 + 20 \sqrt{60} } } \\ \sf\implies{49 + 20 \sqrt{60}  + 1} \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:    \\ \sf\implies{50 + 20 \sqrt{60} } \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

Answer :-

{\large{\underline{\boxed{\bf{\red{a {}^{2}  +  \frac{1}{a {}^{2}   } = 50 + 20 \sqrt{60}}}}}}}

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Answered by Samaffu6
1

Answer:

hlo..

i fine

is it you in dp

pretty girl

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