Math, asked by Dgsb, 11 months ago

If x is equal to 9 + 4 root 5 find X + 1 by X

Answers

Answered by ColinJacobus
1

\fontsize{18}{10}{\textup{\textbf{The rquired value is 18}}}

Step-by-step explanation:

x=9+4rt5

1/x=1/(9+4rt5)

    =(9-4rt5)/(9-4rt5)(9+4rt5)     ....... rationalizing the denominator

    =(9-4rt5)/(81-16*5)

    =(9-4rt5)/(81-80)

    =9-4rt5

So, x+1/x=9+4rt5+9-4rt5

              =18

Answered by lingalaashok
0
Answer is 18 eighteen
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