Question

if x=9-4√5 then x+1÷x is equal to
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Answer 1

Answer:

18

Step-by-step explanation:

$x=9-4\sqrt{5}\\=> \frac{1}{x} = \frac{9+4\sqrt{5}}{81-80} = \frac{9+4\sqrt{5}}{1} \\therefore ,\\x+\frac{1}{x} =9-4\sqrt{5}+{9+4\sqrt{5}=18$