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Mathematics 13 Online
OpenStudy (anonymous):

43

Mehek (mehek14):

I'm not good with this sorry :(

OpenStudy (michele_laino):

hint: \[\sqrt { - 2x + 1} - 1 = \sqrt { - 2x} \quad {\text{this}}\;{\text{is}}\;{\text{an}}\;{\text{error!!}}\]

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