Question 30765
You actually got the correct solution, and it's the same as the book's.

You have:

{{{(-4+2sqrt(2))/4}}}

But you can divide both the numerator and the denominator by 2:

{{{(-4/2 + 2/2sqrt(2))/(4/2) = (-2 + sqrt(2))/2}}}

which is the solution your book gives. You had found the correct answer :)

I hope this helps!
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