Question

if x= √5+2 find the value of x-1/x​

Answer 1

Answer:

The answer is 4

Step-by-step explanation:

Given $x=\sqrt 5+2$

$\therefore \frac{1}{x}=\frac{1}{\sqrt 5+2}\cdot \frac{\sqrt 5-2}{\sqrt 5-2}=\frac{\sqrt 5-2}{5-4}=\sqrt 5-2$

Therefore,

$x-\frac{1}{x}=\sqrt 5+2-(\sqrt 5-2)=4$

Answer 2

Answer:

the answer is 4thsgdyegbsbxbvxhx