What are the beginning steps of solving this?
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1 answer:
Isolate the radical term, then square both sides:


Note that
is non-negative and requires that
in order to be defined, while
when
. This means we can only find real solutions in the range
.


Now just expand the RHS and simplify as much as possible:




Now,
, which is larger than 4, so we omit that solution. Then
is the only solution.
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