If x = 3+2 root 2 then find x- 1/x​

We know that:

x = 3 + 2*√2

And we want to find the value of:

First, we can rewrite the above expression as:

Now we can replace the value of x by  the one above, we will get:

Now we can simplify this to get:

We could finally compute that last equation, to get:

dont understand

step-by-step explanation:

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step-by-step explanation: